I like the simplicity of
@Mice as a username so that's probably my favourite.
@Fnaar is good too as I'm a lifelong Viz addict.
The user names are a lot better here than a radio forum I frequent which is full of childish Mary Hinges, Biggus Dikkus, Norma Snockers, Lydia Dustbin and oddly, Clive Dixon ( I can't work that one out).
I regret my dull user name which I coined when I could think of nothing else after an evening out spotting glow worms. Which I'd been looking at mice now.