I think that in general, the grad students in my program aren't very happy with "the program". They tend to like their lab or their advisors (in some ways, at least), but there's not a great sense of camaraderie across the department as a whole. (Or if there is, I'm obviously out of the loop). I think a big part of the reason is geographical- people live all over the city, our offices are spread across buildings, and even within buildings the offices can be very isolated.
Perhaps it's just the stage of grad school I'm in, but I know a lot of my friends and acquaintances in the department don't really feel like they're being advised or mentored by our "advisors". We all feel like we're quite a bit on our own to flounder or flourish. One of the reasons for this is probably that very few people in the department are supported by grants from their advisors, so the fates of advisors and students aren't so closely bound. I'm not the only person who is primarily mentored by someone who isn't at the university, which leads to students also spending a lot of time elsewhere.
I feel like grad students in my department need something, but I'm not sure what that something is. Do we need a heavily attended, regular happy hour? A graduate-led informal seminar about career issues? A what-did-you-do-for-your-dissertation-this-week accountability club? I feel somewhat obliged to try to get something going (or strongly support other people's efforts in this realm) because, well, I think I'd be good at it, and someone should do it. Whatever it is, I think we need more opportunities specifically created to interact with and informally mentor each other.
If any of my readers have things to share that they really *liked* about a graduate program, I'd love to hear.