I don't mind avatars, but I think that they should be reserved for people that either have A) over 1000 posts, or B ) paid to support the site.
the second option would only be applicable if the site had a supporting member program.
but, at AI, I think avatars would be tacky. There is a sophistication about these forums, I think it's the color scheme(it sure as hell ain't the users
that makes me not want avatars.