Case in point - this is supposed to look like me:
Really, not so much. It resembles me in that it's a girl with shoulder length, vaguely-reddish blonde hair. Highly disappointing.1
Compare this, however, with the South Park me I created years ago, on the South Park Create a Character site:
It's like looking in a mirror!
1Come to think of it though, the last time I turned into a Simpson didn't work out so well for me either.