I'm at uni so live with five other friends in a big house. It's not your typical student shithole though, it's a normal suburban house, with the downside of being an hours walk from campus. Live with three girls and two other guys, and it's ok. We all get on, but unfortunately my tastes don't really cross over with theirs with most things. It's pretty annoying listening to One Direction and the like before a night out, but I get over it.
During the holidays I live at home with my parents, which is fine.
I'm not sure how I'd cope living alone. On the one hand I'm pretty good at keeping myself entertained, on the other I've noticed I really suffer without human contact. Last semester I decided to stop wasting my time watching TV programs I don't like (my housemates spent all their time glued to the TV watching X Factor and the like), and the side effect of that was spending far less time with my housemates. I started to feel pretty excluded from their group for some reason, and spent loads of time alone in my room, and I guess I started feeling pretty down.
This term it's back to normal though, and I'm hanging out with them a lot again. Not having that option to go talk to someone whenever would be hard I think.