We ate at Storytellers for the character breakfast this past Father's Day. I have to say foodwise, it was probably one of the best character breakfasts we have eaten at DL or WDW. It is much more lowkey than the others. You have the option to order off the regular menu if you don't want to do the buffet. The day we were there it was the two bears from Brother Bear (Koda and Kenai?), Dale and Meeko. Its a lovely restaurant but if you are going for characters just know they are limited.
I agree that the Minnie and Friends is a great option for a character meal inside the park. The two times I have eaten there it has been very hectic and disorganized but they do have so many characters and since its cheaper to boot it was still worth it. My brother has been several times in the off season and had wonderful experiences. I like to make a later seating so that we can do some things in the park during that nice, uncrowded morning time. And I agree with Linda, its nice that the food while buffet, is still served to you (the fruit, bagles and danish are self serve, all the hot stuff is served).