Back in the 90s I used to love the Commissary...now it's just awful. Simply awful.
My favorite TS in DHS is pretty much based on the experience and ambience alone, and that's 50s and SciFi. The food is average (by "real life" and Disney standards). But the experiences are so much fun (stay away from the red velvet cake at SciFi though. I couldn't even eat a bite, it was so gross).
The fruit cart and Starring Rolls are my favorite QS options. I actually like the pizza at Pizza Planet, for what it is, but it's annoying and difficult to find seating there. Plus, they changed the side salad and it's now basically lettuce (plus no Ken's dressing packets anymore).