Well, my real name is very different from my user name (hint: my real name has a space).
My original avatar looked much more like me than my current one, but is was disturbing to a fellow EN Worlder, so I changed it to an image which I hope disturbs him much less.
My current title was suggested by someone else, I'm usually not that witty. My previous title was "Registered Elder" which sort of goes along with the picture. Except for the horns with the shoelace, yes that's me (though you can't really see the true extent of my male pattern baldness, nor the amount of grey in what's left).
Using my real name helps me remember to try to be polite and respectful. With my face and name accompanying every post, I'm less likely to get all flamey (though sarcasm and cynicism can never be entirely avoided). I'm pretty much a straight-forward guy, so I guess they do give you a bit of a representation of the real me.
-Dave