Yeah, definitely!
Someone whom had just come back from a ban(I would believe), and got banned again, commented on how I was the one with white hair picking my nose, as in 'you're the stupid one.'
It doesn't much anymore, but my name made it easy for many, especially in the rp-section, to call me a brat, and I also played a lot on it when I first joined, not that I disliked any of it, but it had its effects and affected how people dealt with me there.
Now though, as I don't rp much anymore, people treat me pretty much as any other member I think.
As for the avatar(and sig), I would say they at least get the attention of fellow fans, and not that I have definite proof, but I'd say that does affect reception of me, a little bit if at all.