We have been going to OKW for 10 years too, and I have yet to have a room with a bad view... We have had units on all three floors, I can't say I minded any of them. We, personally, have never had any real problems with a first floor unit, in fact we tend to request the first floor a lot because we go with parents or inlaws and they would rather not climb stairs. Only once or twice could we hear the people (kids) above us and it wasn't too bad. Those kinds of things don't bother me too much as long as it isn't at 2 in the morning.. Maybe we have been lucky.
We tend to request buildings 45 or 46 because we like the view of the lagoon and trees, but lately have been trying other buildings as well.