My family did all five character meals (two premium and three regular). Food wise Plaza Inn, PCH Grill and Storyteller’s Café all have the same food. The only real difference is what characters may be there any given day.
The food was okay, but the characters are what made the meal. Do your research and pick which characters you want to see unless you plan to do all of the character meals. Plan on spending an hour to an hour and a half at each meal to meet all of the characters.
For Plaza Inn we saw:
Chip or Dale (sorry I can’t tell them apart)
Winnie The Pooh
The Fairy Godmother from Cinderella