Chef Mickey's - buffet, as posted above.
Goofy's Breakfast at Beach Club - buffet, I believe it is Goofy, Pluto, Chip & Dale with Minnie in the lobby sometimes.
O'Hana's character breakfast - served family style. Mickey, Chip, Dale, Goofy, I think. The kids parade around the restaurant with maracas every 1/2 hour or so.
No breakfasts currently with Buzz, Peter Pan, Captain Hook.
I have written to Disney with requests that they add a character meal more geared toward boys.