Steampunk- Inventor

I really love your steampunk drawings. I'm doing steampunk for an anime convention with friends and I noticed you had pictures of different steampunk classes (inventor, aviator) and I was wondering if you knew of a good site where they list the classes (or if there are even a set number of classes). I've been looking and haven't been able to find anything.
Thanks for any help you can give. And, again, you have fabulous pictures, you're very talented.