We loved PO-FQ. It was quiet, quaint, and everything is within a very easy walk. The pool was very nice, and you can also take the water taxi to PO-R and use the themed pool there, as well. We never had to wait for a bus, and there is only one stop, and it is always the 1st on, and 1st off.. so you will get a seat on the way to the parks, and don't have to wait too long to get off of the bus after the parks. The food court is newly redone, and the selections were great!
We haven't stayed in PO-R since it was DXL in 1998. At that time we really loved it. We liked the Alligator Bayou section the best. The pool is very nice, as was the food court. I have heard that the rooms are in need of refurbishment, so if something like that will bother you, you might consider another resort.
We liked CBR, and it boasts of the most recent refurbishments. The rooms were completed in late 2001, and they just redid the food court and shop area in December. We thought that the grounds were lovely, if a bit spread out. Make sure to request a room near the food court and main pool, if that is an issue for you. The pool was nice, if a bit small, but the quiet pools were the best!
CSR is probably the least attractive to us. It is spread out, and the pool is not near the main building. It is also a convention resort, so yes, there may be more amenities, but there is also more of a chance of you getting bumped elsewhere if they need the rooms. It also can adversely affect crowds in the food court and dining room. Oh, and the food court charges a 10% surcharge when dining there, unlike the rest, and isn't run by Disney.
The pool is quite nice, however, and has the best slide in WDW. We have also heard good things about the bus transporation here.
Whatever you decide, have a great time!