Things I love about Weasyl:

The FOLDERS. I can very easily separate my works into different categories. Full Color, Inkblots, Sketches... That way, people who don't wanna see my toon stuff (grrr...) don't have to. It also makes things a lot easier to browse. Also, the SCRAPS folder is like... Right there on my page. People won't just "miss" it when they're browsing my stuff.

The THUMBNAIL SYSTEM. It is extremely tedious to make custom thumbnails for my pics. And seeing a tiny version of my picture often results in a lot of detail getting lost. It also sort of "spoils" the picture, if you understand what I mean. Weasyl on the other hand, allows you to select a square portion of your picture if you so choose, allowing a certain part of your picture to be displayed in the gallery.

STREAM NOTIFICATION. Right on Weasyl's front page, there is a little thingy that tells you which artists are streaming. It may not be effective right now, since Weasyl is still in beta, and not many people can use it to its full potential. But I can tell you right now. If this was an FA feature, it would be popular.

CRITIQUE FLAGGING. If you really want people to give honest critiques of your work, you can flag them for it. Of course, there's still gonna be people too scared to say anything negative about your stuff, if you're somewhat popular. But hey, what're you gonna do.

A CHARACTER TAB. With this special tab, you have an actual gallery for your CHARACTERS, which makes it much easier for people to figure out who you (or rather, your various fursonas) are. This would be a great place to put ref sheets and character descriptions.

COLLECTIONS. ... I'm not exactly sure how this works. But I think it's a way for you to post stuff that OTHER artists made FOR you. Cuts down on duplicate files. Not sure it's necessary, but I don't know much about bandwidth and all that crap.

ACTUAL GROUPS. Instead of just making an FA account and managing it all by your lonesome, people can actually make groups, with input from multiple users, like they do on DA, Yahoo, and other various social networks.

SHOUT PAGE. I can see ALL my page shouts, EVER! On FA, shouts just sorta vanish when they're pushed away by newer ones. Some artists can't even see the shouts before they are pushed away.

FRIENDS and FOLLOWERS. They're not really the same thing. :\ I do love all my fans, but I certainly can't talk to all 10,000 of them every day. The FRIENDS tab lets people know just who I associate with. I'm not sure if this is a good or bad thing, but we'll find out soon enough.

Things I DON'T like about Weasyl:

The SEARCH TAGS. It's highly functional and to-the-point... but I can't make any humorous captions. :( Ideally, I'd have one of those things where I hover my cursor over the image and it displays something funny. But whatever.

All in all, I think Weasyl has done a fantastic job on their website so far! FA is going to have to step up their game if they want to remain the "king" of furry websites.