Gah! It's hard! 
It frustrates me that I can't draw as freely (and as good) as I can with a real-life pencil. -__- But, I guess it's good for a first shot! ^_^Anyway, as some people can almost immediately recognize, this is a random portrait of Len Kagamine!!
I pretty much love him to death, not to mention Link from Zelda and Matt from GSDD at that. I guess I have a swordsman fetish. . .? 
I don't know what the heck happened around the bottom-right corner over there. . .
The picture randomly expanded, I guess. Hmm. Whatever. 
Aside from the fact that I hate drawing on the computer, check out my actual HAND DRAWN sketches on Deviantart! I'm KagamineKiseki- The person who has drawn tons of pictures, but uploaded about three.
Maybe I should scan them sometime. . . Anyway, comments and criticism is very useful! 
http://kagaminekiseki.deviantart.com/gallery/