We stayed at all three and enjoy each for different reasons, The Contemporary and the Polynesian have the largest rooms. While I love the architecture of the Contemporary, to me it has the highest energy level on the Grand Canyon Concourse, however it is a little cold feeling. The Polynesian is very laid back, tropical, beautiful landscaped and great place just to hang out and relax especially the pool and beach areas. The Grand Floridian is our favorite, I love the crisp white architecture set against the beautifully manicured landscaping. It's very relaxed and transport me back to a more gentile time when things didn't feel so rushed. I actually find myself hanging out in the lobby listening to either the piano or orchestra. We started staying on the monorail resorts when we had small children now can't seem to stay anywhere else. Hope ya'll have a great time!