How willing are you to "true up" wonky verticals (and indeed horizontals) in Photoshop? I'm perfectly happy to do it, because I could do exactly the same with camera movements. But what on earth does that have to do with making it acceptable? Also, have you ever found that it's just impossible to get some subjects sharp? Including even some people? They just look soft, regardless of lens, shutter speed, focus or anything else. It must be something in the way that we (or at least I) look for clues for sharpness. There are some ruminations about both these questions in my latest Picture for the Day. Cheers, R.