My current avatar definitely doesn't look like me in real-life (after all I don't think Christmas trees would be able to post into forums or anything...), but I've used a couple avatars in the past that did kind of look like my real self.
here -that 2nd one gets my current hair length even more right than the 1st one -I cut my hair once every 4 months or so to the length of the 1st avatar, and in their longest they have the length of the 2nd- and also the approximate right eye color (my actual eye color is dark brown instead of light). But I also wear glasses in real-life (even though I can see decently enough without them) and both avatars don't (opting for eyepatches instead), and also they represent a person slightly younger than my current age imo, so anyways these are more "kind of looks like me", than "omg, it's my doppelganger!"...