Actually, I *do* know what it is! They're all massive, massive geeks. That suits me just fine, especially since on like the second day some guy approached me and asked if I'd like to be a part of the newly-formed LAN gaming club on campus, to which I could only respond "Yes. Yes I would." The chemistry students, though equally smart, were far more bro-ey in their pastimes, which mostly involved:
1) Heavy drinking.
1) Ultimate frisbee.
2) Complaining about research.
3) Heavy drinking.
However, the Standard Compsci Psyche DOES have its downside, in that a few of these folks seem hell-bent on proving they're smarter than other people to a degree I never noticed in a Chemistry department. Actually, it's really just one guy in particular. My discrete math class is peppered with exchanges like:
Professor: "X is true."
That Guy: "But isn't Y true under Z conditions?"
Professor: "That's... yes, but that's not really related to the current subject."
That Guy: "Well, I feel like it's important to bring it up. Furthermore, I think it's important for everyone to note that, if we disregard A, B is true. And furthermore...."