Most people in HSV, being retired couples, only want one living area. But many houses will have a study or combination study/bedroom right off the living room.
People who have rooms down in the walk-out basement area below the main floor usually have a game room or work room downstairs.
We wanted all of our living space on one level (not counting the loft), and we (well, *I*) wanted space for a pool table, so we have both a living room and a den on the same level. (See our floor plan.)
The den has a 20-foot ceiling. Since we raised the roof for the den, it cost very little to add a loft over the adjoining kitchen and breakfast area, adding an additional 300 square feet. We use the loft as additional sleeping space and a ping-pong game room.
The guest bedroom on the far side of the breakfast area doubles as our study. Although a hallway leads into that bedroom, we put a short-cut door from the breakfast area into the study. So someone at the desk in the study can see and communicate with someone who is in the kitchen or den.
Since we come home through the breakfast area door, it is easy for us to look into the study to check for phone messages, FAXs, and even email. This is much more convenient than if we had put the study on the other side of the living room as we had originally planned.