Depending on how challenging conditions are, I'm going for 75%+ correctly exposed and in focus. Less than that and I'm sloppy. More, and I'm hesitating on the shutter release.
On an average day on the street I might get 3 to 6 passably good shots on a roll of 36. On a bad day I might get less than a shot per roll. I've had a couple of days in my life where I had 20 or 25 per roll.
I dream about those days.