The castmembers in general, from the Captain all the way down. It's wonderful to see the small childrens' eyes light up as they see the REAL Cinderella, Belle, Jasmine, etc. I remember seeing a princess kneel down next to a little girl in a wheelchair, look directly into her eyes, talk to her, and give her a huge hug. I'm sure that girl (and her parents) will remember that forever. I know I will.
I was near the bow of the Fantasy last fall, and there was a perfect rainbow in front of the ship as we were underway. A woman nearby was staring at it. As she was doing so, one of the ships officers walked past. She asked him incredulously, "How do they DO that?"
Without missing a beat or breaking stride, he replied, "Compliments of Mr. Disney."