Shooting lots and shooting good are not the same thing. Something to remember, and it is hard for us sometimes, is that we are merely one part, and probably the least important part, of the wedding.
At some point, as shooters, we can step over the line, and go from recording the day to being part of the day. When we do this, we are no longer doing our jobs.
Every time we click the shutter, we are risking overstepping our bounds. We aren't there to shoot everything that moves, we are there so that in the future, the people involved will have a keepsake of the day, something that will trigger a fond memory.
If we've done it right, perhaps we can bring a tear to an eye or a smile to a face sometime down the road.
If we've done it wrong, then they remember us, and not the important stuff.
They don't remember the smile on the bride's face as a ring is slipped onto her finger, they remember the fat ass in cheap corduroy that kept blocking the view.
I read on mail lists and camera forums of photographers who shoot several thousand exposures during a wedding and I cringe. Why are they subjecting their customers to this? It's not what they signed up for. They didn't sign up for a three ring circus and a trained seal wearing a bad suit.
Weddings aren't about photographers and pictures, no matter what we think.