What brought you to choose a mouse to represent yourself?

Mice are small, but still distinctly cute and mammalian (I'd previously been things like wolves, foxes, a tanuki, human-sized bat, rabbit, and so on). Mice are small enough, in fact, that they can be reasonably swallowed whole by a larger animal without having to be shrunken down.

Once I decided to be murine, everything just kinda "clicked" the way no other species ever did before or since. But I'm only a "mouse" in a vague sense - not any real specific species, but more a magical/spiritual _idea of_ a mouse; a little bit of house mouse and fieldmouse, a little bit of rat, a little bit of marsupial mouse (not a rodent, but a marsupial that fills a similar environmental niche like a planigale, a pygmy possum, a dunnart, or at the larger end of the scale a tasmanian devil), a little bit of bat ("fledermaus")...even some design influences from meerkat, ferret, raccoon, or tanuki. And so far as I know, mice aren't supposed to have padded paws (not that this stops other mouse furries from having them the way cats and dogs do).