Basically on our accommodation form there were a few set questions with a few (mainly yes/no) answers you could select. I think these were:
1) Would you like to be in a quiet area?
2) Would you mind living with smokers?
3) What time do you usually go to bed? (Before 11pm, 11-1, after 1) <-I think
4) Would you mind living in a same sex area?
I can't remember if there were any other questions..(?)
Then there was a section where you had to say a bit about yourself (rather than the sort of people you wanted to be placed with). I think it told us to write down our hobbies, how much we went out etc. It was quite general. You could write as much or as little as you wanted on that bit. Hope this helps!