I agree most sluts are nice! Sluts rock..
There's an authenticity with a "slut" that you just can't get with a "nice" girl. Time after time I've seen "nice" girls covertly get together with well-known players or disrespectful scumbags and then talk trash about the party girls. Or use sex as a negotiating tool with their "nice guy" boyfriends while giving it up for free with the 3rd string football player they're seeing on the side. I have trained myself to spot one of these types a mile away.
And no, it's not all about sex. Some guys just like to hang out with the kind of girls you can just watch the game with or go hiking with without the constant "I'm tired" garbage.