Here's some images and other projects I've worked on using my computer as a brush. I have spent many, many hours sitting at this chair that I find myself at right now, and I'd be tickled pink if somebody other than myself actually looked at them!
What I really enjoy is learning new applications. I can usually hit it hard for a month or two, and then usually lose interest & go lookin' for another program. That's probably why I like shareware so much.
I'm also a 3D nut, and my 'puter's spent many a night rendering till the wee hours. Programs like Bryce & 3D Studio Max I really dig, because you can get great renders right from the start, but I also crave the deeper aspects, learning all the little details of a program, too. I use Corel's Dream 3D for the heavy-duty stuff because it supports exports from CorelDraw, my favorite drawing app.