When I create my stems, I create the following on my console:
Dialogue 5.1
Music 5.1
SFX 5.1 ( includes Foley and SFX )
AMB 5.1
And once in a while i'll put something in the rears from Foley... or center or where ever via the 5.1 stem. ( obviously I never use the .1 for Foley ) But I have used all the other channels...
..and, yes.. 90% of the time it's center channel, 9% of the time its L R and the 1% of the time in the rears...
but i'm kind of a perfectionist so go figure.... ( and a little anal at times )
Wink
cheers
geo