Considering that I don't have a massive amount of experience in reptiles, I'm not gonna go for chameleons then. What about any amphibians? Dart frogs are the ones I'm most interested in. I'm also heading over to the pet store today for a sump for my reef tank due to the protein skimmer leaking, so I'll see what they have there. They often have crested geckos, and a few of you suggested that.
Bullsnake in a 3'x1'x1'?