I think our favorite spot on the mode dial is a religious matter -- it often defines our first priority to the shot and everything else follows. Mine is locked on Av unless (a) I deliberately want a specific shutter (< 1% of the time) or (b) I've got the flash on in really low light and I go to M. It's not right, it's not wrong. It's what I do. Each of us has our own sensibilities to follow.
Exactly what I do!!
But unlike you I hate to use AUTO ISO on my 7D as i often find it not to select high enough ISO's. I like the auto-metering of my camera, I seldom use spot metering, only in extremely different lit situations where I would need DR my camera can't offer.
Auto-ISO on the 7D unfortunately is still limited, even after firmware update 2.0
Only 5D 3 and 1-series have fully functional Auto-ISO. sigh.