Resort choice
Caution - long post!
I've not been to Pop Century so I can't comment on that resort. My friend stayed there and he said it was fine. Pool tended to get a bit crowded though, he said. Also, food choices were a bit limited.
With that said, I'll give you some points on POR and WL. First the disclaimer - WL is my favorite resort but I've only stayed at 4 (FW, POFQ, POR, and WL).
We just returned from a week at POR. My family liked the resort very much, especially the food court. POR has a full service restaurant and a food court. The POR food court is better than the WL food court, hands down. Larger, more cash registers, better variety of food, including pizza made right on site. Overall resort theming is very nice. We stayed in Alligator Bayou, 1636 (lodge 16, room 1636). Rooms open to the outdoors. No balconies. The rooms are very nice - fridge, double sinks, sleeps 5 (hide-a-bed underneath one of the beds). The beds are double beds. To get to the main area (conceirege, food court, store), you have to walk outdoors. POR is a huge resort and its easy to get lost. The pathways amble around and you need to follow resort signs to make sure your headed in the right direction. The pool was fun. Its shaped like an bowling pin with an "island" in the center of the lower portion. Overall, its not very wide and it tended to get crowded. The slide was VERY SLOW. Both times I tried it I nearly got stuck for lack of water movement. POR has a marina, boat rentals, a boat to DTD and surrey bike rentals. The general store is pretty large and has a good variety of merchandise. The grounds are beautiful with ample wildlife (rabbits, ducks, geese, etc.). Overall rating, A-/B+.
Now WL. The theming is impeccable. The foyer area is AMAZING. A 6 story fireplace which is made to resemble the Grand Canyon rock striations. Everything is enclosed (rooms open to interior hallways) so you never walk outside to get to restaurants, store, concereige. The rooms at WL are slightly larger than at POR. Rooms have two queen beds or a queen and a bunk bed., two sinks, fridge and a balcony that you can relax on. Rooms sleep 4. The store is good size and carries a good variety of merchandise. I think the pool is nicer at WL and the slide definitely is faster. WL has a variety of children's activities (rubber duck races on the waterfall/river area, crafts, etc.). The location is nice - just a boat ride from the MK. They have a marina and rent boats and surrey bikes. You can walk over to FW to the petting zoo from WL. But here are the things I enjoy most: When you drive up, the guard always says "Welcome Home." Just makes you feel like part of the family (the guard at POR never said that and we drove back onto POR property at least once a day). WL plays music evocative of the American west (Aaron Copland's Rodeo, music from Silverado and Dances with Wolves, etc.) everywhere around the resort. I always wake up early in the morning, sit out on the balcony and just listen to the music - very relaxing and totally immersive. WL tends to be a very relaxing, quiet resort. By the pool it can get noisy, but you can be put in rooms that are VERY quiet and very relaxing. Plain and simple, the food court at WL stinks. This is the one major complaint I have with the resort. Its not big enough, especially in the morning, and doesn't offer enough variety of foods.
Buses: POR buses tended to be full. They pickup/drop off at POFQ first, then circle around to all 4 of the POR stops. It took about 10 minutes just to get off resort property. WL buses never seemed to be as full as POR buses. Yes, you share with FW but they still seemed to run more efficiently than what I experienced at POR. At night, PO resort buses tended to be the most crowded (I guess PO guest like to stay out late). I looked at other stops and none were as crowded as PO buses.
My 7 yr old son said he like POR but missed WL. My 11 year old liked the food court at POR and to her it was a tie. My wife likes WL better. I definitely like WL better. But you pay more for WL - on the order of $50 more per night.
If you stay at WL or POR, I suggest you build in time to enjoy the resort. WL and POR CAN allow you to relax, if you take time off from the parks and explore what each has to offer. If you spend most of your time at the parks, then go with whats cheap and spend the extra $ in the parks.
, but you just can't beat it for atmosphere, convenience, amenities and location - and the price is right for me, too. 
