Agree with FFF - good description ...
Flying out of balance is sloppy, it affects aircraft performance and shows that you aren't paying much attention.
On centreline seating types it is pretty east to tell when you are out of balance by different pressures on your bum cheeks!
It works in side by side aeroplanes but it is probably easier to learn this in tandem types.
If the left side of your bum feels "heavier" or has the seat pressing harder against it, you need more left rudder.... simple really!
There are times when you need to fly out of balance but these are generally in aerobatics and in side-slipping.
Stik