There is nothing wrong with coming back with a ton of photos from the session. Digital files cost almost nothing in comparison to film, and memory cards are becoming even more affordable each year. When you shoot a lot, not only do you get higher chances of nailing that one perfect shot – but you’re also exposed to a bunch of images that ‘didn’t work, and while you’re culling and going through them – you’ll start to understand why they didnt work. It may have been the focusing, the light, the exposure or even the pose the couple was in.
We have learnt a tremendous amount from our own mistakes this way, and this is largely why we have a habit of filling up a good few memory cards even when the shoot may be under 2 hours.