a well done animated sig isnt the least bit annoying, and can still be done well within the size requirements if you know what you're doing. I usually make a small animation that lasts a second and then stays still for maybe 5 or so seconds.....but anybody who finds a name that fades once in a while or even a constant animation that FITS as a loop (i.e. a loop of a person walking) as annoying has issues. Sigs are meant to be unique and interesting, if people are limited by their means of expression, then whats the point?