I Drive is restaurant heaven. There's also Restaurant Row on Sand Lake Road, plus a ton of stuff nearer Disney.
Generally popular chains which we have enjoyed (some more than others!) include:
Outback Steakhouse
Longhorn Steakhouse
TGI Fridays
Chillis
Olive Garden
Carabbas
Macaroni Grill
Uno Chicago Grill
Bahama Breeze
Miller's Ale House
Friendly's
Perkins
The Cheesecake Factory
Denny's
IHOP
Johnny Rockets
Margaritaville
Hard Rock Cafe
Tony Roma
In terms of our favourites, our next trip will probably include:
Margaritaville
Tony Roma
Perkins (breakfast in particular)
Outback
Longhorn
The Cheesecake Factory