I like wearing shorts. At night. The fact that I can do this, at least some parts of the year, in New York, makes it a great city. In New York, I never once left the house wearing a tshirt, walked a neighborhood over, spent a few hours at a friend's, and then nearly died of hypothermia walking home. The fact that residents of SF have to check the weather every two hours and every time they cross into a new zip code is, imo, a fatal flaw. Yeah, it's often nice, but never nice enough for long enough (48 hours of reliable 70+ temperatures). Now, a few miles down the peninsula, things get more interesting...