Maybe my case is unusual because YC takes applications online, but I don't like it when people walk up to me and "pitch" me by reciting some preformulated speech about their startup. I can almost never understand what they're talking about. And it makes me feel like a target, in much the same way it probably does to women when guys walk up to them and recite preformulated pickup lines. The unit of conversation with a…
If there's one thing I've learned over the years (whether meeting new startup people or trying to get a date) it's been the "don't be a douchebag" rule. Treat people like people. The best "pitch" is actually not a pitch. It's authentic, where you're talking to someone who you honestly believe will be interested in what you're doing, and you're sharing something you're sincerely excited about.
The last person you want to be is one of the "Jersey shore meatheads" trying to dry hump some poor woman out on the dance floor (to harken back to my earlier analogy). :)