Harley Quinn, this one was painted on a 3D base render. It's based on a classic Harley pin up by Bruce Timm.
Superman
Magneto. This was done for comic con challenge on gameartisans.org a while back.
Spidey
Another stylized Spidey
Venom
I've been a comics nerd since I was a kid. Grew up with a lot of Marvel and DC like many out there. I've had my favorites throughout the years and many artists from both of the big two publishers have been a great influence in my work. These are only a few examples, some are a bit old. These days I do a lot of 3D sculpting, so my 2D skills have fallen behind, but I still like to do this kind of pieces now and then to take a break from 3D.