yeah, they have a lot of personality. When I upgrade I'd like to have a whole bunch. I've seen a few pictures of mated pairs hanging out together in their hole and it's super cute. Hopefully I can get some of that action going on - I think I have two males right now :P
Mine like to cover up with a few pieces of rock rubble I've supplied them with. They carefully arrange them every night, and in the morning they arrange them around their hole. If you move one of the pieces during the day, they'll go looking for it and bring it back, then stare at me as if saying "WTF did you do that for?"
Here's one of my little guys trying to eat a hawkfish:
