THANK YOU, all of you. I appreciate the thorough, honest answers.

After researching more thoroughly, I'm dying to get a Dumbo Rat. Obviously, I would get a same-sex pair. The only issue is space, and because of this, I may still go with mice, but it all really depends on how I feel once I'm at the store. If the mice are aggressive, I'll probably go with some rats, but if nothing else works out I'll go with the Crestie.

The only reason I proposed mice was because I had a 10 gallon tank that is empty, and won't be filled by a reptile any time soon. I saw the mice a month or so ago at Petco, and for the first time ever, I wasn't terrified (maybe having reptiles had that effect on me).

Thanks again, y'all, your advice was invaluable. Especially about the mice smelling. You'd think a rat would smell more with all the extra body mass. Huh.