For what we consider the full American breakfast experience, with waitress service, unlimited coffee refills, a full inquisition on what kind of eggs you want (LOL!), the following list is fairly comprehensive right now:
Dennys
Perkins (our joint fave)
Bob Evans (likewise!)
Cracker Barrel
Friendlys
IHOP
Waffle House
First Watch
Toojays
The following are all buffet breakfast alternatives (good value but not quite so authentic):
Ponderosa
Shoneys
Black Angus
Golden Corrall (our top choice of the buffets)
Sweet Tomatoes (Sunday only but brilliant for lunch and dinner every day)
Whistle Junction Buffet & Grill (Sat and Sun only)
(To the best of our knowledge, the Sizzler chain stopped doing breakfasts last year)
Other choices serving breakfast that are also worth trying are:
Panera Bread
The B-Line Diner (inside the Peabody Hotel - one of our all-time faves)
East Lake Fish Camp (yes, the rather rustic cafe here serves some of the best breakfasts in town!)
Atlanta Bread Company (a relatively new chain, similar to Panera)
Shakers American Cafe (downtown Orlando)
All the Disney resorts also do an excellent breakfast service (one of our faves is the Whispering Canyon at Wilderness Lodge, served family-style, while O'Hana at the Poly and Boma at Animal Kingdom Lodge are both highly recommended), while the Hyatt Grand Cypress offers the most spectacular Sunday brunch, with the Renaissance Resort Orlando not far behind (when their buffet re-opens in the New Year).