We have stayed at CSR, ASMo & Riverside (POR).
I liked POR the least if the three, with ASMo actually coming in ahead of either. (DH liked CSR, the ASMo, then POR.)
POR I thought was cheezy that guests get a coffee maker on request, but have to pay for the coffee. (And that charge doesn't include cups, suger, creamer or a stir stick.)
The CM service was not good. More of a I'll-help-if-I-feel-like-it attitude from all except the food court and gift shop. There the CM's were GREAT.
The room at POR was the dirtest of the three resorts from our experiences. And the bus service was terrible at POR for us.
One of my fellow Dis-ers said it best. She has stayed at all WDW resorts many times through the years. She calls POR the resort that can't quite get their act together. And that's hitting right on the head, IMHO.
If I go to another moderate, I would try CBR, only because we have not stayed there.
DH did like the bakery at POR because it was always well stocked and convenient. But he liked the baked goods best at CSR, but they were not as stocked in the evening.
ASMo had long lines at night for baked goods/ice cream.
I was actually more impressed with the food court at ASMo than POR. It seemed newer, cleaner, more spread out with better selections. But the staff was much friendlier at POR.
CSR had the best food court, but lousy check out (food court) service.
Always good and bad with any resort, I think. And I am sure each time brings different experiences.