Springs is the last stop and is the closest to the rock pool, check in area, store, restaurant, etc. This bus stop can be crowded because many people walk over to the store, etc and then catch the bus from there. Also, because it's the last of 5 stops, the buses are sometimes full if you are going at peak times of the day.
Congress Park is the section that provides views of DTD and it's the 4th bus stop. This is probably my favorite section. It is a nice quiet pool and the walk to Springs where all the action is is maybe 5 minutes. We've never had any problems getting a seat on the bus from here. This is the quickest walk to DTD of about 10-15 minutes if that is in your plan.
Paddock is the 3rd bus stop and has the new feature pool and counter service.
Carousel is 2nd stop and least favorite section because it's the farthest from Springs and there is no pool.
Grandstand is first and has a pool and childrens splash area.
I have stayed in all but Carousel. Springs is my least favorite because of the crowded bus stops and if you get close to the end where the bus stop/pool is, it's noisy sitting on the balcony. I don't hate it there but given the choice, I'd take another section. I've been happy in all of the other sections and didn't think any was that much better or worse than the other.