Well, i would say the majority of students are english, followed by either scottish/american, northern irish, european, chinese etc.. I heard a rumour (so not strictly true) that around 13% of students are scottish (altho that could have been 30%) which aint a lot, but i dont really have any evidence for that as rumours here are like chinese whispers.
There are a LOT of american students. Not a bad thing, but probably the highest proportion of americans outside america in a university. Feels like it anyway.
Nights a week drinking... for me, currently too many :$ There is always somewhere that will have promos on on a particular night, so if you have enough cash to do that then good for you. Altho a lot of people tend to come to uni to learn stuff, but everyones usually out on a friday... if u wanna go clubbing theres always dundee, glasgow or edinburgh. Depends on how much money u have tho, a taxi home from dundee can cost £20, so the more of you, the better. Edinburgh is only good if you have a floor to sleep on and glasgow = my home, so i much prefer it there.
I remember in first year, my friends roommate exclaimed that she was 'used to a much larger drug scene in new york', which still makes me laugh to this day. Millions of people live in new york, 16,000 people live in st andrews. However, again, its not something you should look for in a uni and yr access to 'hard drugs' may be somewhat limited and i doubt that anyone will really appreciate it either. But in a town full of students, herbal methods may be a common way to relax
If you are a maaaan, then there are about 900 more females than males at this uni and it shows. Lots of beautiful young ladies, but a drought of good looking guys.
And so on and so on. Is that sweepingly general enough?