We had loads of gerbils when I was a teeneager. We used to supply the pet shop!
They were great. they used to chew up cardboard tubes and loved a nice fresh earwig to crunch up.
We even had one of them operated on to remove a tumour! (we did have the vet living next door!)
Have had a hamster too, it was a bit stupid and did manage to bite me everytime i cleaned it out (apparently they have very bad eyesight and it mistook my finger for food!)
Hammy used to regularly escape into a kitchen with 3 cats. Sadly one day it decided to hide behind a box of soap powder which it then ate, needless to say the soap powder did not agree with it and he went to the great wheel in the sky.
Both were fairly smelly. But gerbils win for me!