> I think this is based on the assumption that people like others that are like themselves, which in fact is not very true. I prefer to be around people that are very different from me.

Unfortunately, it is uncontroversial that most people show preferences for people similar to themselves when choosing friends, romantic partners, and employees. Nobody, that I've heard, is saying that this applies to every single person, so there's no reason to say that it can't be true because you don't follow it.

http://www.sciencedaily.com/releases/2011/09/110922093313.ht... for a random paper