As everyone here on DIS knows, for me it is clearly Goofy's, hands down. One reason is because I am comfortable with it - I have been eating there since 1992 (see link in my signature for Trip Report/Goofy's pictures). But I have been eating there since 1992 because it always delivers for me. I am not a big fan of the GK dinner, but the breakfast buffet is outstanding. There is a wide variety of yummy things to choose from - wider than the buffets at the other character meals. You can get creme brulee French toast, banana crepes, biscuits and gravy, Mickey-shaped cobbler, croissants, mini-muffins, mini-Mickey waffles, all kinds of pastries and standard breakfast fare, pizza, chicken, and the fruit is SO fresh and delicious, while the bacon is some of the best I have had. I like that there is a mix of furry characters and face characters. The regulars seem to be Goofy, Chip, Dale, Baloo and Pluto, and there is a rotating cast of guest stars which includes: Alice and the Mad Hatter, Aurora and Prince Phillip, Jasmine and Aladdin, Belle, Snow White, Captain Hook, the Genie, Minnie, Cinderella, Fairy Godmother, etc., etc. If there are lots of characters on duty at one time, it can be hectic and sometimes hard to get a bite of food because they are coming at you, one after another. If there are only a few characters available at a given time, they make repeated visits to the table for more 'quality time.' It is a fun, lively environment and the characters are playful - even for those of us who have no children and just like to eat at Goofy's!!! It is costly to eat here, but I feel it is worth the money for the variety and quality of food you get, as well as the characters.
I have done Storytellers twice for their character breakfast, and while it is nice to have the option to order off the menu, I find their buffet to be a better value than the overpriced menu items. But the buffet is more limited than Goofy's, so it is hard to justify the price to myself. I love Chip and Dale, but I can see them at Goofy's. Baloo sometimes shows up, but I can see him at Goofy's. I am not that interested in Koda, Kenai or Terk, and I could take or leav Meeko. I think Storytellers is a nice restaurant for other meals - it is very quiet and relaxing and cozy - but I am underwhelmed by it as a character meal. It is not bad, and I would recommend it to someone who wanted a more sedate, calm meal as opposed to the high octane fun of Goofy's, but I am sticking with my old pal Goofy and his friends and their buffet!!