If you reserve a preferred location room you'll get Trinidad North, or Martinique, both of which are right next to the main pool/concierge/gift shop/food court area. I think those preferred room upgrades are well worth the up charge. Plus, you'll know the area you'll definitely be placed in.
I have had times at Disney that I got my exact room request, and times that the room I was assigned couldn't be farther from the requested location.