If only talking Mickey and Friends -
Garden Grill is our favorite for relaxing, peaceful eating with caring characters who never have rushed us. I also appreciate being served.
Cape May Cafe is also fairly quiet and while a buffet it was very easy for us to enjoy our meal un-rushed. Characters were great with the kids.
Ohana was not loud or chaotic but it was very time consuming for our day and we ended up leaving before the last character because we were at well over 1.5 hours already. Everything was too slow. We waited almost 30 minutes just for our first plates of food and that is after waiting to get in.
Tusker House has a very nice breakfast buffet, but the character interaction was rushed, some missed us (our server chased them down) but we saw them all and if noise is an issue - while this may not seem a big deal to many to us it was - it is a concrete floor, not only was it loud but young kids and utensils - lots of dropping and loud clanging noises. Maybe it was just us but DS was unnerved even with ear plugs.
Chef Mickey's is probably our worse dining experience on property. The tables were tight (lack of personal space), the noise was over the top, the constant dancing and music, characters moved through so quickly I didn't feel like we had but seconds - add bad food and service .... I went excited and left totally disappointed for all of us.