QS at DLR is soooooo much better than WDW. The DIS agrees with this as well if you've ever heard some of the podcasts. DLR is mostly a QS place as there are very few TS. At WDW, you revolve around your ADRs...not the case at DLR.
We prefer going to Storytellers if we have to have a sit down. Cafe Orleans is fantastic as well, the Pomme Frites are a must. It seems like just about every guest orders those as they're always flying out of the kitchen with them in hand. We also have been to Blue Bayou and Carthay Circle, which are all great and my top 4 suggestions right there with those that I mentioned.
I would probably cancel all the Downtown Disney ones and stick with the actual Disney restaurants, Goofy's Kitchen and Cafe Orleans would be the keepers.
Some great QS places to visit are French Market (but if you're going to Cafe Orleans, you may skip this so you don't have two Cajun style meals, it's just our personal fave QS). Then there's Rancho Del Zocalo if you like Mexican. The Plaza Inn is famous for their fried chicken and ranks #1 on most people's list, this is a QS unlike WDW's The Plaza Restaurant.
Over at DCA, there's Corn Dog Castle which is amazing. You MUST have a corn dog at DL, it may not sound like it, but these are by far one of the best items in the parks. We like Lucky Fortune for Chinese and Pacific Wharf Cafe for their Sourdough Bread Bowl broccoli cheddar soup.
Be sure to stop by the Ghirardelli shop for some free chocolate as you enter and then go next door to the bread tour and get a free piece of bread.
And if they still have booths up, you'll be able to get any number of snacks and small-meal items from the various food booths, which are all fantastic, if a little overpriced.