We used to always ask for Building 5 -- close to the pool, food court and bus stop. It's a great location.
In April, however, we were assigned to Building 1. I thought it would be too much of a hike and I'd hate it. I was wrong. We really liked being on the river; it was a pleasant, quick walk to any place. It seemed a bit quieter over there as well. I truly think any of 1, 2, 5 and 6 will make you happy.
First time we were there, we got Building 7 and I didn't care for that location.