Seriously....just make a decision! Every year people seem to worry more and more about the tiniest of details within every hall; you are NEVER going to get a grasp of what a hall is really like by listening to other people (unless it's Durdham, in which case, they're probably bang on), so if you like the look of the hall and think you'd like to go there, stop panicking, pick it, and go and get on with trying to pass your exams/doing something constructive! There will always be at least one person within each hall that you with click with, unless you're a member of the monster raving loony party (in a non-ironic sense), so just relax!