:huh: :) :huh: :) I would say a frog maybe.
pacman frog. frogs in general can be very demanding. many require exact temps and humidities and you even have to grow their food yourself. a pacman just sits on the shelf patiently waiting until the next feeding.
the pacman frog we have at work is about the meanest frog i have ever seen. its the only frog i have personally seen that tries to bite and attack.
many pacmans are aggressive eaters that go for anything that moves. some grow out of it, and some are never that bad. the 5 at my work right now are all pretty laid back. my big 6" female ornate is very laid back and is very good at differentiating between my hand and food.
I say newt, specifically the fire belly newt. They don't need any heating, don't need a huge tank. I guess if you live closer to the equator they might be harder(need to cool down the tank)They do need a filter since most are mostly aquatic, about 2/3 of the tank should be water.