depending on the person, really. but i see an avatar as what the person wants to project themselves as - an indicator to their insecurities and flaws. but then again, i'm something of an asshole deep down so i probably shouldn't have said that. oh well, this feels better out than in. so i'll just use myself as an example so i don't insult anyone.
my avatar is of a crazy smiley face. why would i want to project something crazy or impulsive seeming? because i fear being too normal or ordinary. it means that in real life i either am normal and boring, or i try to project something more interesting such as my avatar in real life, too.
take it as you will, but when i see an avatar that you're wearing i do the same thing.
is it too judgemental?
probably
is it insightful?
in most cases, absolutely.