Crocodile Tree Monitor perhaps?
Nah, I reckon crestie's sound perfect for you, they don't need much space or heating (if any) and are great fun to handle, plus there are loads of amazing looking morphs to choose from. The only thing that requires much attention is there calcium and vitamin intake, especially when they are young. But tbh this is the same for most geckos and isn't that hard to get right.
1.0.0 Dumerils Boa (Khan)
1.1.0 Corns (Snow Coral Motley 'Jonesy' & Carolina het Am,An,Hyp,Mot 'Indy')
0.0.2 Crested Gecko (Billy The Kid & Jesse James)
0.1.0 Bearded Dragon (Missy)
1.0.0 Leopard Gecko (Derick)
0.1.0 Homo sapiens (Nicole)