DHS has five sit down restaurants (one is buffet):
Hollywood Brown Derby (my favorite for food, but not worth 2 TS from a price stand-point. This is one of the two places my family tries to go to every trip)
Sci Fi (fun atmosphere and good, but casual, food. This is my family's other favorite place in DHS)
Mama Melrose
Hollywood & Vine (buffet)
50's Prime Time (some people love the interactions, others, like me, avoid it all costs)
There are also a number of big QS places:
ABC Commissary (my family liked it, I wasn't very impressed)
Studio Catering Company
Toy Story Pizza Planet
Sunset Boulevard (several different venues all lumped together)
And then there are also lots of stand alone kiosks or stands. These include things like Min and Bill's Dockside Diner and Starring Rolls.