We just got back and went to LOMH 3 times. The only thing I was disappointed in that it was always the same characters each time. When we went last year, we saw different characters on different days.
This year Stitch rode the Dumbo ride and was out and about. Alice, the Mad Hatter and Mary Poppins roamed around. Mickey, Pluto and maybe someone else played games-duck duck goose and so did Peter Pan, Wendy and Captain Hook. Pooh and Tigger played games at the Pooh playground.
My older daughter, who is 4, loved it. Most of the games are geared towards the little ones. The characters interact more than at a plain character meet and greet.