I think Goofy's may be a few dollars more expensive than the others, but the prices change with the on-and off-peak seasons.
So, do you like Princesses?
Ariel's Grotto in DCA.
Do you like the more classic characters like Pooh, Tigger, Eeyore, Minnie, Captain Hook, Fairy Godmother, Chip and Dale?
Minnie and Friends inside of Disneyland.
Do you like Goofy, Chip and Dale, Baloo, Pluto, sometimes Alice, the Mad Hatter, Belle, Jasmine and Aladdin, Aurora?
Goofy's Kitchen in the Disneyland Hotel. Here is a link to the Dining thread page on which J.C.andAli'sMom posted some wonderful photos of the Goofy's breakfast (not the dinner). There are also Storytellers photos on that same page:
http://www.disboards.com/showthread.php?t=1253888&page=82
Do you like Lilo, Stitch, Daisy, and Goofy in surfer gear?
Lilo and Stitch at the PCH Grill in the Paradise Pier Hotel. And here is a link to the Dining thread page on which got2travel posted some great pictures of the Lilo and Stitch buffet:
http://www.disboards.com/showpost.php?p=18126978&postcount=200
How about the woodsy/jungly Disney characters such as Koda and Kenai, Baloo, Chip and Dale (yes, they get around!), maybe Meeko, possibly Rafiki and a Br'er character or two from time to time?
Storytellers Cafe in the Grand Californian Hotel.
I am sure someone will come through with some photos of the Minnie's and Ariel's food, and more food from Storytellers.
Ariel's Grotto and Goofy's Kitchen have character meals all day, basically (minus a few mid-day hours at Goofy's when they close to prepare the dinner stuff). Goofy's is an all you can eat buffet ONLY (no off the menu orders there), but it is a very large assortment of food to choose from.
Storytellers and Lilo and Stitch have smaller buffets (all you can eat) and also off-the-menu ordering.
Minnie and Friends is more 'buffeteria style,' where you get your own drinks, you get a tray and slide it on the counter and a server hands you your food.
Which one sounds good?