i just thought someone should post something regarding this . . . this is going to sound silly because i'm not even applying this year, but my roommate from college visited after she was accepted and said the following things that stuck with me:
It's small. so small it almost feels too small, but it seems like the students and professors are very close because of the size
you feel like a god walking around stanford's campus (esp. the undergrad part)
obviously it's california, so . . . (we went to school in NY)
hope that helps somewhat - I'm sure other people will have lots more to say.