MF is 'standard' for me.
Other formats only when absolutely needed.

Which means, i guess, it's MF all of the time.

Visualising, getting creative, etc. is all 'basic photography', and is the same whatever format you choose.

Big cameras are a pain in the rear because they are big. A solution to that is use a smaller camera.
Small formats don't deliver enough quality. A solution to that is to move up a format.
And then you end up with MF: the perfect solution. Small enough (most, but not all) and delivering quality images.

The point is somewhat defeated when you begin to use MF cameras as big and heavy as LF camera, or 35 mm cameras as big and heavy as MF cameras.
So it's not just a film format thing.