Originally posted by RioRico PP is part of the image-making process. Discarding shots before shooping them is just a waste.
Waste of time for having taken the shot in the first place? Maybe, or maybe a useful learning exercise. Waste of what might have been a good shot? Sometimes, but then one can also waste time trying to rescue a shot in PP, only to send it to the bin in the end. Of course that, too, can be a useful learning exercise.
Will depend on type of subject and on shooting style, but for me it's important to do an immediate cull on transferring the files to the computer. Disk space may be cheap but time and attention aren't. Learning to quickly recognize and to be ruthless about what's good/workable vs. what's trash should help develop a better eye for getting good captures in the first place. At least I hope so; I've got a looooong way to go.
That said, I keep all my 'maybes'.