Choose what resort suits your taste and budget really. I didn't even consult my DH when planning our Disney trips, LOL, much less the kids. They have liked each place we've stayed though!
We sometimes go back to the room for a bit of a rest, but never with the intention of fully taking a nap. The kids would nap in the stroller comfortably, but it would have been an epic fail trying to get them to nap in the hotel room.
I would also see what budget your parents are comfortable with, and consider things they may enjoy. I like the Epcot resorts a lot, as it's nice to go for a walk around the Boardwalk in the morning with my coffee, and we like the ability to walk to other resorts and into Epcot. Our first trip as a family of 4 (kids were 2 and 4) we stayed for 10 days in a one bedroom BWV, and it was a great trip! Nice to have the kitchen for snacks (I could make a simple breakfast or some noodles or something for them in the evening), and the washer/dryer was nice!
Although I've stayed there 4 times, now AKL is not my favorite. We stayed at Kidani last trip, and we like to go to counter service places to grab a bite to eat. It was a hike or we had to take the shuttle just to get to the Mara. Plus it felt so isolated.
My new favorite resort when it's just DD and me is Pop. I like having a huge food court with lots of selections, and the room is just fine! I can't get over how expensive Disney resorts have gotten, so I just feel more comfortable spending less (we really don't spend a ton of time in the room anyway).