I go to WDW several times a year and have pretty much settled on the moderates as my resorts of choice. We like to mix them up, but have stayed at all four more than once. I'd rank them #1. CSR, #2. POFQ, #3. PORS, and #4. CBR.
We love everything about CSR and in fact I'll be back there in just 9 days.

They have the best bus service and best food court. They also have the most comfortable queen size beds (much better than the new queen size beds at POFQ

). They also have the nicest kids playground area. They have the sliding wooden doors that separate the vanity area from the bedroom area. They have the biggest hot tub on property and the longest pool slide among the moderates. They are also the only moderate to have a health club/beauty salon and a lounge that is adults only after certain hours. We like that it is a convention resort, because the conventioneers are in meetings all day, leaving the buses for us. We also like how you can get food and also refill your mug right at the main pool, saving a walk over to the main building.
I've been in Casitas 1 (once), Casitas 2 (once), Cabanas 9B (three times), Cabanas 9A (once), and Cabanas 8A (twice). Cabanas 8A is my favorite location by far--two minutes to the main pool, two minutes to the Cabanas quiet pool, two minutes to the bus stop, and less than five minutes from the main building.