New/North Cinema Floor. I live there now and love it. It's all very cool cinema and video game design nerds, but right down the hall you have all of your frat and sorority types, so there's a great social balance. Plan to be social though. The kids who never come out of the their rooms are all weird and no one likes and/or knows them.
Based on my experience I'd give it an A+ if nothing else than for the awesome people who love the same things I do. Plus, on the USC cinema floor there's a very strong chance that your roomate will grow up to be the next Spielberg or Lucas. It also dramatically improves your chances of getting into New/North, which is extremely popular, as special interest applicants get preference.
Hope this was helpful.