We saw Daisy at Mickey's Surf Up on 1/7/12. She came around a few times. We also saw Mickey, Minnie, Stitch and Pluto.
We did 3 character meals between 12/30/11 and 1/7/12. We did a dinner at Goofy's and saw Goofy, Pluto, Minnie, Brer Bear, Alice, Mad Hatter, Chip and Dale. We did a breakfast at Minnie's and saw Minnie, Chip, Dale, Pooh, Tigger, Fairy Godmother, Penguins, Donald Duck (which really surprised me), Captain Hook and Smee. Definitely the most characters at Minnie's. My DS1 and DS3 loved it.
Mickey's was the lightest for characters but what I would consider the a lot of interaction. At most of the character meals they stop by your table, pose for pictures and off they go to the next table. At Mickey's they had a DJ who did dances with the kids. Mickey actually started to "twist" my DS1. He was grinning from ear to ear. I also noticed that of all the meals we went to there were fewer other people at Mickey's. Maybe 20 tables at the most. I think if they increased the character interaction they might get more people.