I shoot in A about 70% of the time for when I'm generally shooting off a tripod, M 25% of the time when on a tripod and shooting landscapes & want control over the exposure and then S for the last few %.
I have grown fond of sticking the camera in manual mode when in tricky light at parties etc and then put the camera to 1/125th, f/2 or f/2.8 and let the auto ISO do the work!
Aperture for me too. BTW does anybody ever use the scene modes ? Can you see a day when SLRs will just drop them altogether and consign them to the P&S market ?