I chose cresties because they're one of the easiest to keep, cheap, and they won't destroy a nicely decorated enclosure. Finding them is half the fun. My sister has fish and 1 invisible shrimp lol, and everyone loves looking for it!
Dart frogs can have awesome realistic enclosures - that won't get destroyed.. They sharp coloration on them makes them gorgeous, and you can house multiple!
A well-taken care of monitor will most likely have a huge home. That will be impressive no matter what monitor is in there
.