The current president of Y Combinator and successor to SV investor and essayist, Paul Graham.
In his own words Paul Graham says that "Sam is one of the smartest people I know, and understands startups better than perhaps anyone I know, including myself. He's the one I go to when I want a second opinion about a hard problem."
Today he spends his time moving YC forward, dealing with the waves of entrepreneurs trying to impress him in superficial ways in an attempt to garner entry into the incubator (I once hacked a non-computer system by [insert something borderline illegal here or morally questionable, albeit pretty smart]. He tweets declarative statements about his idea of the perfect founder, similar to how a teenager would describe his or her perfect boyfriend or girlfriend (not to his own fault, it's his job), as well as tweets about how well YC is doing in general.
Sam Altman says that the best founders live in the same apartment as their co-founders so we've decided to move in together! We're even going to sleep on the same king sized bed and mention it on our app, so we'll probably get an interview for sure.