I've been at me school for what, 6 years now? I miss the early years, mostly just the fact that all my friends are withing a 2 mile radius at all times. If I wanted to hang out and have fun, I'd go hang out at my suite, where 6 of my best friends lived. If I wanted to work, I'd go to one of the Engineering buildings. There was always something fun to do.
Nowadays, I have a one hour commute to the school. I spend 12-16 hours a day in my lab, where I am the only American in a research group of 9. The others can barely hold a technical conversation in english, nevermind a casual conversation where there exists both a language and a cultural barrier.
Undergrad was fun, for the last two years. Grad school, not fun, but should pay off more in the future.