I have a special liking for Calibri, and I blame Mibu for that. Either way, I think the normal Arial is fine, but you're the ultimate judge for yourself in the end.
Also, I dunno others can use it, you or I may just not know it. Is it really an issue, though? Do whatever you want, and don't let someone get in the way of your fun unless it breaks... uh, some type of a rule, somewhere?