-When you meet someone who is a little (or more likely a lot) socially awkward, they probably have a graduate degree. That's just what happens when you spend every waking hour of the day studying.
-Interaction with other grad students outside of your department is also incredibly awkward. After attending only one event sponsored by the Grad student organization, I vowed never to attend another. Unless you're getting a degree in a frilly subject like journalism, you will never belong or feel comfortable in one of these outings.
-Topics of conversation range from your subject to your subject. But sometimes comic books and genre movies get thrown in there too.
-Grad students generally pretend that they know a lot more than they actually do. As long as you put on a good face for the professor and kind of know what you're talking about, you should be good.
-Failing your undergrads is often entirely unintentional (for some TA's), although the fact that you have the ability is appealing.
-Any chance to show off your status as a grad student will be taken, even if that means taking the elevator to the second or third floor because you have a key and the undergrads don't.
As the semester progresses I may find more interesting tidbits to post, but it's getting harder and harder to talk or write about anything outside of my field.