I find it varies seasonally - here in Canada, during the winter I tend to spend more time inside, and thus more time listening to the system intently, and more often in the sweet spot. During the summer months, I am more frequently outdoors, and thus less often down for listening sessions in general.
My main system is in my unfinished basement, and shares that space with my pool table.
Every week I play pool 3-10 hours, and the system is always on during those times, so those are times when I am listening but far from the sweet spot.
I like it equally when directly seated, or floating around the basement with tunes on.