For me, I have to say I enjoyed the spa (who wouldn't?). I've had massages before, but the hot rock massage was da bomb. I also played bingo 4 different times. Twice I actually won.
The kids, my dad, and I also enjoyed the movie theater. My daughter and I went to see "Mars needs Moms". We missed it at our local theater, so we enjoyed it on board. The 4 of us went to see Cars 2. Definitely a cute movie, one we'll have to get on DVD at some point. They were also showing Pirates 4 and Prom in the theater. Then there was "Funnel Vision". A big screen over the pools on one of the funnels. It ran a lot of the animated favorites (Cinderella, Monsters Inc., etc) constantly from breakfast until after dinner. The kids and I also watched "Toy Story 3" from the room. Lots of access to Disney movies on board.
I think my husband enjoyed the ability to roam and take photos. I haven't seen any of them yet, but I'm sure they're good.
There was a lot for us to do (both organized and not). We came home tired but happy. My kids want us to start saving up to do it again. I think they may be on to something.