This is a question I've pondered often when reading posts here. I read the post, look at the avatar and wonder is that a picture of the poster.
So is your avatar really you?
Why did you choose that picture?
and
If your avatar is an image of someone else, why?
BTW mine is me - it's a bit of an odd photo, but I just like that veiw of the heel. Shame about the chair leg.