If there is one thing I wish I could change about our house is the fact that their is only one bathroom and that can be a bit of a nightmare, even more so when you're in a rush and someone is in the shower. I have gone from having 3 bathrooms at home (living with 2 other people) to one with 5 people. It can be an argument waiting to happen but as long as everyone is considerate (do you need the toilet before I shower kind of thing) it'll all be gravy. My final thing would be the food sharing, it's so pointless to buy 5 lots of everything such as butter, bread and toilet roll. It makes so much sense to split buying them between whoever you are living with and that way there are no fights over who bought what.
Would you live with your friends?