If you have children, the St. Augustine section has the most for them including a pirate ship, and water slide . St Augustine also has a gym . Seniors seem to like the KeyWest Section , it’s usually quieter and it seems like it’s stays sunny longer. These are the only two sections I’ve stayed in. The Bella section is where the main pool is and there is a quiet pool over in that area too. Personally, I’ve enjoyed every building I stayed in. I’m sure you can call the front desk and ask for a south facing room. I know that there are some great videos on Sheraton Vistana Villages done by Tuggers and others that could help you make a decision. My favorites are on YouTube and called Destination Timeshare.
Best Wishes