I will use the big ring on my triple on flat ground if there isn't much of a headwind. I've been working on becoming more efficient and I've learned that if I am in the big ring, and drop the rear to 6 or 7 (with 9 being the highest) I go faster than if I were in the middle ring and in gear 8 or 9. Of course this is all relative to how my body feels that day and so forth. I have learned that just because a particular gear combination works on x stretch of road the other day doesn't mean that I will like it the next day, just too many variables.
I've a goal of becoming more efficient at shifting, and I suspect this is a goal with an ever-moving target. For some reason I don't even think about shifting the front going downhill, though I will shift the rear...

