That's my handle for a reason having nothing to do with the philosophical concept, actually. Each person has his or her own reason for picking a handle, often publicly unknown and personal -- this is one of the cool things about handles.

If handles looked like this though: solipsism1, solipsism34, solipsism85, solipsism87, solipsism21, solipsism3485, solipsism_is_cool, solipsism_4thewin, solipsism111.... well, I can see being annoyed at seeing the same thing over and over again. It wouldn't bother you I guess. That's cool, there's no accounting for taste.