Our kids were 6 and 3 in April on our visit to POFQ. They have stayed at ASMo, ASMu, and POFQ. Of these three, they enjoyed ASMo the best - just loved the Dalmation and Buzz icons. But were also impressed by the musical instrument icons at ASMu and the alligator icons and Mardi Gras masks in the POFQ food court. My son liked the POFQ slide, it was too scary for my daughter.
In my opinion up until age 5 or 6 the kids don't care were they stay - as long as there is a pool and a playground. Speaking of playgrounds - the AllStar playgrounds were nicer than POFQ, I guess more little kid oriented.
Over age 6 the resort amenities start mattering to the kids. I would recommend staying wherever you (the parents) want to stay, I bet the kids will love it. Next trip let the kids have input to the decision. Besisdes you will probably be spending a large part of your waking hours at MK, not at the resort.
We have stayed at ASSp, POR and CBR but it was long ago - pre-kids, and have not stayed at CSR or PC, so I can not comment on these resorts.
Have a good trip.
Jeff