I have several best friends, but my best friend in the states is a huge man mountain (comes with playing American football I guess) but he is quiet, but when he does speak, he reminds me of Frylock from Aqua teen hunger force, as he is level headed and a science nut. It's a shame he can't fire laser beams from his eyes.
My best friend here in Britain (who is another American) reminds me of my mother. In fact, I have mentioned this to her. She makes sure I eat healthily and stuff like that. If I get too stressed about something she will calm me down and help me put it in some kind of perspective.