It's my personal belief that just about anything can be tamed (with the exception of maybe a golden tegu...now those are nasty.). I've got five tokay eggs getting ready to pop out any day now, and I'd like to have them at least pseudo-tame before I try to sell them. I had a little guy that I was working with, and for a while he was getting to the point where he'd tolerate some handling, but then I started to concentrate on other things, and now he's reverted back to his primitive ways, lol.
Kevin