The best character interaction for breakfast, IMO, are 1900 PF (Mary Poppins, Alice, the Mad Hatter, Pooh and Tigger), Cape May (Minnie, Goofy and Donald), Akershus (princesses). Face characters tend to give much better interaction because they can interact with more than just gestures and are generally a lot of fun. Cape May tends to be quieter than most other character meals and the characters sometimes come around more than once and the interaction never feels rushed (unlike CM, CP or TH).
I will give honorable mention to Garden Grill for dinner. The food is nothing great, but rotating around LwtL and the character interaction are great. The characters sometimes come by as many as 3 or 4 times which can be a lot of fun.