right guys it's the same thing you're asking all over again, and let me just say i was worried last year too that i'd end up with people i didn't get along with.
but thing is unless you decide to be an unsociable, silent, lonely person, then it shoudln't be aproblem making firends... and i mean a lot of them. you all are in the same boat, not knowing anyone personally and as scary as it may sound for some, you're bound to end up having a fregging great time.. it's just a question of being yourself and opening up.
i for example was scared i couldn't be my own ironic, random, crazy type of person my old mates knew me as, but within days i was able to pull the smae jokes as i did back home and this was amazing.
so for sociability you'll get it in halls, and you'll also get during Fresher's week and most departments they actually organise fresher events for new studeents
law even has a trip to france
geographers (me) have pubcrawls, a ball, monopoly race, games, fun and competitions for a whole weekend, where we got very little sleep coz all just chatting, dancing, drinking and jiggying.
so bottom line is, one is not better than the other. it is the people who are there that make it the best sociable. and if you do, however it is mostly unlikely, end up in asituation, where u either can't get along with people or some are completely boring, then there always be a chance of moving to another hall.
but it is good to start friendships from the ground bottom.
relax guys and focus on your exams.
also i i know some poeple who organised to meet up here from UCL, and i was also very involved with a lot of people wia facebook before we all arrived at UCL, some of them being my closest friends now:d