What kinds of things do you like to do? Since it is a couple only trip, I would definitely stay in a 1 bedroom for the whirlpool tub in the bathroom and the big relaxing living room and balcony all to yourself.
There really are no bad areas of OKW, but if you are enamoured with specific views, your choices are woods, water, and golf course. Keep in mind that many buildings have all three of those at the same time!
If being near a pool and the accompanying hot tub is important to you, maybe request near a neighborhood or quiet pool. I say this because the main pool will be noisy with all the kids enjoying the castle water slide. Since anywhere on OKW property is a quick walk or busride away, there is no need to specify near the Hospitality area unless you plan to spend the majority of your time in the sidewalk bar, the restaurant, or the fitness center.
If it was me personally....I would request building 55 near the quiet pool there. It is a great spot with the best view of the canal, and very quiet. It's also the jumping off spot for the walkway to DTD, so that's handy as well. We enjoy that neighborhood pool a lot, and the bus stop is the second stop coming in, so fast for returning at night.