I love Goofy's Kitchen at the DL hotel. You'll see Goofy, Pluto, Donald, Aladin, Mad Hatter, Alice, Baloo, or some combination of these characters. I've also heard that Storyteller's Cafe is good too, and that's right in the GC. Here you'll see Chip, Dale, Meeko, Kanai and Koda.
I guess it really comes down to who your son would most likely want to see. There's a Lilo and Stich breakfast at Paradise Pier hotel as well as a Princess breakfast, inside DL at the Plaza Inn.