I'm in Derwent and would 110% recommend it. Our social scene is so much better than every other college, with two bars close by, you're far more likely to make friends with a wider range of people than other colleges IMO.
PM me if any of you want any questions answered. Do not underestimate the importance of the college you pick though, I find it to be a pivotal part of my Uni experience.
Derwent = Party
James = Sporty
Hes East accommodation = best available, however it's very quiet over there and always seems a bit dead.
Don't go to Halifax if you can help it, I would be amazed if someone disagreed with me on that one.