My current machine is on top of a smallish sturdy computer stand in the smallest bedroom of the house. There is a wall (with a window) to my right, a desk behind me (when cleared off I use it as my cutting table), the stand/sewing machine in front of me, about 6-12" of space and a tall large deep bookcase. Currently I have a bedside table next to desk, but I want to move that out and put in a storage unit I got at the goodwill, one of the nice heavy clear plastic drawers/black case things.
Any way, while I can piece in a small space, for quilting I want as much space ahead of me and to the left. I used to set up on the corner of my large dining room table, it was nice, a crib quilt fit, twins weren't bad and queens were manageable. No longer have that table and I really don't want to quilt anything larger than twin in my current setup -- and that is at the edge of my ability.