A few years ago my friend asked me to draw a nice spirit familiar for her.
The result was quite bad: http://savepic.ru/9301209.png
I was not good enough to show friend's favorite animal's traits (ferrets, weasels, otters, etc), but today i thought i should try to draw that spirit again. And you know what? I think i nailed it!
My friend loved this picture and i as well. This is really important experience for me.

Hope, it will inspire you to keep practicing!