OK, I know this is going to be either an 'Aaaaaw' or 'Eeeeew' post - but I'd like you to meet Dotter's new babies, brothers Mort and Binky (yes, of Terry Pratchett fame). They are her 17th birthday present.
They are black hooded 'fancy' rats, and just delightful (I must admit a prior involvement - I had a gorgeous little pet rat called Sarah when I was about 10). They're about 5 weeks old, and extreeeemely cute! Binky is very cuddly and Mort is more adventurous ...
A few good points of rats over mice as pets :
1) They don't smell bad
2) They can be litter trained, and don't wee and poo all over the place
3) They love being petted, and will relax and fall asleep in your hand while you rub their back
4) They're much more intelligent, and can even learn their own name, simple commands and tricks
5) They are curious, friendly and sociable, and love to play
I know, if you're not into rodents, well, you're not into rodents. But since we can't have a bigger pet (ie a dog), because of renting, this is a good alternative.