This thread (our character meal photo & information thread) might give you an idea of which characters you will find at each character meal:
http://www.disboards.com/showthread.php?p=38372063#post38372063
At
Ariel's Grotto in California Adventure, you can dine with the Princesses for breakfast or lunch. It's only Princesses, though.
At
Minnie & Friends in
Disneyland, you will meet Minnie, sometimes Chip, Dale, Winnie the Pooh, Tigger, Eeyore, and a wide variety of other characters (Minnie & Friends has more characters than the other restaurants).
At
Goofy's Kitchen in the Disneyland Hotel, there is a very large buffet for breakfast or dinner. Goofy's has the largest selection of food out of all the meals. You will usually see Goofy, Chip, Dale, sometimes Baloo, usually a couple of Princesses and any number of rotating characters.
At
Storytellers Cafe Critter Breakfast in the Grand Californian Hotel, you will see Chip, Dale, Koda, Kenai and sometimes Terk, Meeko and maybe a Brer character or two - generally, any woodsy or jungly Disney characters. You can order off a menu or get the small buffet.
At
Surfs Up with Mickey and Friends in the Paradise Pier Hotel, this is the only character meal where Mickey can be found. You will also see Stitch, Minnie, sometimes Goofy or Pluto and Daisy Duck.
My preference is the Goofy's Kitchen breakfast (not the dinner). Yummy buffet, wide selection of food, classic characters, fun environment. But other folks prefer Minnie & Friends because there are so many characters!! Some folks like the Critter Breakfast for its laid back, earthy kind of atmosphere.