All our bedrooms are on the upper floor. The lower floor is dominated by a fair-sized kitchen and a really big lounge room. There's other stuff on both floors but the point is that if we want to sleep (or whatever) it's on the upper floor. Mum has the master bedroom, Sally and Sandy share a room (and wouldn't have it any other way) and I have mine. We each have an ensuite; one of the reasons Mum and Dickface Dad picked it was because of the ensuites. You don't try to force a brother and twin sisters to share a bathroom without there being repercussions and consanguineous sex was...