I haven't eaten at the Pepper Market at CSR, but we walked by it on our last trip and it smelled amazing.
Other favorites?
-MK - Columbia Harbour House or El Pirata y el pirico (if it's open). Both are an excellent alternative to burgers and fries. I like Casey's Corner for their corn dog nuggets, but I don't like the limited seating.
-Epcot - Sunshine Seasons in the Land - a great value if you are on the dining plan. Also, great selection and so much variety. Also, we love the fish & chips from the pub side of Rose & Crown.
-AK - Used to LOVE Yak & Yeti CS, but last trip, it wasn't very good. Might have been what we ordered or just a bad day. Many people prefer Flame Tree Barbecue, but we weren't impressed.
-DHS - We really enjoyed the Toy Story Pizza Planet. I had heard bad things, but the pizza and salads we had were good.
-DTD - Earl of Sandwich is AMAZING. The Hawaiian BBQ sandwich is to die for. We also enjoyed the pizzas at Wolfgang Puck Express. We had the four cheese pesto, and it was tasty. I've been craving it since we've been home!