I love that you have backstories.
I am one of those types who want to tell a story. So my characters always have or gain a backstory, because how else will I know how they will react on different things? What drives them on? Because our past defines us. It draws the outlines of who we are and the things happening us thought time are what colors us in and adds the details.

And for the same reason I had the biggest problem starting my comics. The full story of the character had to be there, in my head. WHY would they do this or that. WHY they would choose this path and not the other one.

I have many characters so I wont go writing them all out here. Most of them have very mundane lives, some of them have had more hardships than others, some have had more adventures and some have stayed in their small bubbles.

Many of those characters have had different backstories than they have now, because the more I have grown up, the more I have realised that less drama actually gives more depth to the character. Becuase I want my characters to grow as people. Their stregth coming from small things and not always from somebody dying or them being abused all their lives and so on. The usual gimmicks. The moment I stepped away from the comics and movies I had watched my characters actually gained depth. Most of my characters have that way gained parents and kids and spouses who also became more than just objects.

Like you, I love diversity. That shows in my characters, I hope.

But at the same time there are things bothering me. The comics I want to draw had bigger cast. And there are characters I want to include, but they don't really fit in anymore. And other characters can't simply do and say what the ones I am cutting of did. But as frustrating it is, I have also found that the characters I put filling up the empty spots, improvise and actually make the scenes different, bettering them in a way or another. And they are also solving problems I've had. xD

And last but not least: the fursona thing. I have never had one. The only two ones coming to even close being that were actually just one part of me I wanted to write out. And now even they have changed in my head so much because I have changed so... not sure if I will ever write them out. But yeah... never been good with them fursonas or personas of myself. When i was kid I had them, but not anymore. It is too personal to me. And I don't like talking about me, revealing myself, just my stories and characters.^^;

I love writing back stories for characters. It really helps to establish a personality, and even some of their appearance for me.
Definitely love that you strive for diversity in your characters, not just in species but also in personality.

I really need to get back to writing Vigo's actual story.
He's kind of been split between his original story, and an alternate universe where is in a relationship with my friend's character working as a bouncer at a strip club (and trying to leave behind a past as an underground prize fighter).
In his original story he was a soldier- he deserted after his brother was executed. His primary motivation was to find his little sister who had been thrown in an asylum after the death of her mother. His story has kind of been very "classic Russian novel" so far.

It's hit or miss for me. My shiba inu character doesn't really have much of a backstory, his whole concept was to basically "be meta". Wilk's backstory is pretty much my life but with a few creative nips and tucks. The rest of my characters have a backstory to some extent. I'm better at creating characters and universes than I am at actually writing stories with them. So I end up making a universe and populating it with characters and then they just sort of roam about and do their thing as I see fit at the time.

I find though, on the whole, backstories are more fun to have than nothing.

I understand your frustration with story telling. I had a very popular fursona at one point in time that can best be described as curvy petite corgi sci-fi chick with doggles. Her back story was intense, well thought out, and I was working on writing blips of her life and story.

She lived in a utopian sci-fi world of anthros, and the "cuter" common species would live in these elaborate, scientifically and technologically advanced cities, whereas the more uncommon "ugly" critters wound up being rebels to a system that treats them like second class citizens and often wound up living in more rustic, but equally complicated rebel societies.

My fursona was a student researcher that had stumbled upon an incredibly unethical and dangerous military project to alter the neurological patterns of living creatures, and decided to run away and join the rebels at the behest of a cyborg rat character I made for an ex of mine.

It was meant to represent my frustrated state with scientific progress in that it can exceed the boundaries of what is ethically acceptable for profit.

But then, a frustration point hit.

Although the concepts were good and I liked playing around with them, they were similarly limiting to other people's canons and characters; the bigger problem was also that my fursona soon changed from a fursona to a character with her own personality.

In fact, some aspects of her personality kept getting farther away the more experiences she had got into the realm of absolute fiction, rather than my original intent of putting a twist on stories from my real life.

Although the head canon and character I describe certainly still exist and I'll still pick up some of the concepts every now and then, I had to retire her as my fursona upon reflection that she had changed quite a lot from her original "It's basically me as a sci-fi corgi" state.

So now I'm trying to strike a balance. I still love developed head canons for my own individual fursonas, but I am attempting to make them more similar to my own experiences, instead of the outlandish fiction that began to develop around Ms. Sci-Fi Corgi.

Like you, I also have about 4 different fursonas each with their own individual canon I'm developing. The multiple fursonas seemed like a good compromise to explore concepts like a magical head canon while still having characters to use for more realistic head canons.

I'm still kicking around full development of the worlds and stories, especially because a couple of my fursonas are new to the game.

What I have basically figured out though is that my fursonas the cat, the black sheep, and the budgie all live in a head canon where it's basically modern society with lots of furry people.

There are three types of people that evolved on this world, Mammalian race, the reptoid race, and the avian race. Each of these can possibly resemble a creature from our world i.e. a dog and often the varieties often have their own unique culture.

Basically though, generally all mammalians can interbreed within their varieties, all reptoids within theirs, and all avians within theirs. So hybrids of different varieties of the mammal people like say someone who looks like a dog mixed with cat lineage is entirely possible.

There are also definitely those that are more of a hodgepodge and don't resemble any of the more common species anymore, especially as social tensions about interbreeding ease in the modern age, paralleling the real world issue of inter-ethnic relationships and such.

With that head canon being more modern in nature, I imagine I'm going to explore more sci-fi themes but probably not as foreign as the concepts in the other head canon sometimes became.

The unicorn fursona lives in a magical canon separate from this head canon and the magical world there is largely populated by mythical creatures. I'm still working out the details of this canon, but it should be interesting.

So far I've worked out most everyone has a type of magic they can do, but there's many different types. My fursona is unique in that she has issues controlling her particular kind of magic, and it's largely an exploration of my real issues with being strong and capable and yet having issues getting things done.