Sure, we all get sick of each other's avatars from time to time.
They are sort of like CV photos...
Sometimes I have a difficult time caring what someone writes if their avatar is too obnoxious (e.g., New Kid on the Block).
If no one was allowed one, I'd lose a nice visual cue, and I would feel more like I were reading a tedious academic paper. Then again, it would sort of level the playing field-- kinda like wearing a uniform to school.
Also, it's not always the avatar that might be annoying, but the username.
Granted, my avatar now (Rai) is a bit on the juvy side, but when the mood strikes, I can change it up whenever I want.
What can you do?--have everyone wear grey and chant the same slogan? Of course not.

I'm talking about the one you had recently, up until a week or so ago.
Wasn't that David Byrne?

Not me. None yet.

I was a Mallard with face.