I really like this one. It's really interesting in that there's more negative space than colored space.
I like how this one turned out too. It's a little off center, but I still like it.
Poison Ivy. I kind of just made this one up. Turned out pretty well I think.
This I'm particularly proud of. I got the image off a google image search and thought it was pretty freaking cool. This was done in pencil in my sketchbook. Yay Joker! I love him.