Great. You do have the right of veto though. Also you may feel uncomfortable about lending your room out. Neighbours need warning. You need to check your accommodation or property lease: if parties and/or smoking aren't allowed you might get stung on the deposit. Also get real: some nice middle class people with University degrees thieve as opportunistically as some people from any other walk of life: a party is equivalent to leaving for front door open and going out for the night.