I start out seeing the background. I think 'no problem, I'll just look at the bit that's in focus.' Then I look some more. 'Aha,' I think, 'the subject blade of grass is in focus.' But it's not. 'Then that tiny little drop in the center of the picture is in focus, surely.' But it's not. Then I start to wish the photographer had just let the drop fall and gotten everything out of focus.