I choose friends based on personality. Always figured that's what matters. But I've known people that it did matter to. A friend of mine's sister(she's 29) says that fat/unattractive/sloppy people bring down your "property value". IF you surround yourself with good looking people then good looking people will flock to you. You'd have to know her she's a real piece of work.
Apparently she gets it from their mom who thinks all fat people are lazy. She likes to say "you didn't get fat from walking and inhaling air did you?"

Needless to say I've gone rounds with both of them but I've met a handful of others that were like them.