I'll admit, that was the major thing that drew me into playing Eden Eternal, one of those free to play MMOs. It featured a playable mouse race called the Zumi and they were just downright fun and cute to play as. I still have a few pictures of one of my characters that were this race:

Spoiler:






They had a race of frogs and bears that were playable, also (I forget their names). Sadly, they pulled the plug on Eden Eternal a few years ago and this MMO is no more, but it did give me many hours of great fun and featured a lot of cool stuff. Sad to think it's all gone, but I've still got these pictures as memories.

Still, we need more MMOs with fun and unique races like this! So few MMOs and RPGs have them. After a while, you kind of just get tired and fatigued of playing humans, elves, dwarves, and the usual run-of-the-mill stuff that just isn't creative anymore and feels like it's been done over and over.