FreelanceButler said:
Gecko, easily.
Probably a side effect from playing Gex non-stop when I was a kid, but I've always loved geckos.
I'd want loads of 'em. Make 'em sit on the walls and ceilings and stuff. Creep people out when they walk through the house. Yeah...
But I'm cool if we're only allowed one. In any case, he'd be quieter than the little box of noise I call my cat.
To be honest.....kinda boring. The cooler ones hide almost all day, play mainly at night, and are fairly skittish. You'll almost never see them :-( And they're not really a critter you can play with, either. Many are very, very mean, and will break their tails at the slightest provocation. They bite, they run FAST, and will get places you couldn't reach even if your last name was Fantastic.
Unless, you get a Crested gecko, those are comparatively docile, but still may freak out and bolt into some hyper-dimensional corner of your house you'll never be able to reach in a million years (take it from me)...but, all-in-all, they're about as docile as a gecko gets. But they have a VERY specialized diet, and can be tough to feed. And, unlike other geckos, their tails are prehensile, and they don't shed/break them with the regularity of other geckos...
Not tryin' to rain on your parade, but just a warning. Geckos are...interesting, sure, but they're not all that great as pets, either. I had a particular fascination with them for a while and accumulated a number of breeds, and the biggest commonalities with them were being able to see them only in brief spurts before they bolted (at midnight, at that), and crazy tough living conditions to maintain...
Of course, there's always the Leopard gecko, and those are very chill and easy to take care of, but pretty common, as well.