Hello!
Congrats on your offer!
This is a super common question and the best way to decide is to pick your accommodation which will narrow down some choices. Then have a look at a campus map. Would you like to live in the centre (noisier, but closer to lecture theatres), or further out? Nowhere is further than a 20 minute walk on campus though! It's impossible to predict which colleges will have loads of 'sesh heads' because it changes every year depending on the cohort! In general, townhouses are the most sociable, followed by standard, ensuite and studio. Obviously this changes though! Your course doesn't have to much of an affect as in first year you'll likely to be all over campus for lectures/seminars/workshops/labs. (the best college bars are Fylde & Grizedale though)
Hope this was helpful and let me know if there's anything I can help you with!
Charlotte
3rd year Biological Sciences with Biomedicine