Derpy Has Mail

wanted to draw Derpy and try to make her...cute? sure lets go with that.

I really don't like the shading. I need to work on that more. course this is only my 3rd time actually even using my tablet and drawing something. No background this time either since I suck at doing them.

I've noticed that when I draw rainbow dash's or derpy's tail, it kinda has the shape of fire...hmm

Please guys tell me what you think. Critiques are always welcome. just be nice about it.

Vectored version here

Program: Sketchbook Pro 2011
Layers 4
Time: I forget