I find that too. One of the reasons I haven't got a huge amount of photos of things is that I feel I'm missing something when I'm taking the photo. On the other hand, when I do get good photos, I feel I should take more.
I used to take loads of photos of drag racing, and miss half the action, so I stopped. Now,I've seen that much of it, that I'm back to taking photos again, just for the thrill of getting a good one, in amongst the loads of worthless ones.