Aside from being an American, I pretty much follow everything Kalmarjan just stated.
Regarding 1" = 5' bother me in trying to create interior structure maps and trying to accomodate space for mini's requiring 5' of standing space. If I create a 10 x 10 room, it almost seems I am forced to put any furnishings on one side or the other, to allow a 5' wide space for pc mini's to walk past.
I've been in restaurants where there's lots of people sitting a tables within a 10 x 10 space, fairly comfortably, far more room than what mini's on bases could possibly fit in that same space.
I end up creating larger than required rooms to fit my room contents and still allow several minis to be able to move around in.
The 5' space requirement really cramps my effort to creating realistic interior maps.
Just my 2 cents.