CSR for sure. We've stayed at most of the resorts at this point, and our CSR stay was just about the only stay where we wished we could have a do-over. We stayed for 8 days at CSR, then a extended day at POP and wished we had just stayed at POP the entire time. As nice as CSR was, it seemed more like a Marriott than a Disney Resort to us. If we're paying Disney bucks, we expect better themeing. The overall layout was also a turnoff for us. I understand many changes have likely taken place since we went, but we felt like we were in prison at the food court. You get your food, then sit in an iron gated area and pay before you leave. I much preferred situations like Poly or AoA where you can get your food and sit outside without much hassle. I'm sure there are those that love CSR, but not for us. I suspect the biggest issue comes down to Value vs Moderate vs Deluxe. We like most of the Deluxes and most of the Values. The moderates feel like an un-happy medium for us. You don't save as much money as you do staying at the values, but you also don't get the themeing you would get for the money of the Deluxes. If we're saving money, we'll be at a value. If it's an all out trip, we'll be at a deluxe.
From the above post, Contemporary is a big red flag to us as well. Man, it's hard to beat that Theme Park view, but we have a 2 and 3 year old, and the food options were terrible for our family as a whole. The kids hated every plate at that resort. That's honestly a deal breaker for us.