What I really dislike is the "you should have taken it from a different angle" or "I'd have used a different lens", sort of thing. Sorry, too late for that!! The shot is what the shot is. Your suggestion is of no help to me now!
You seem to mostly shoot candid portaits Frank (or should that be frank portraits?), so there's not much point someone telling you "I'd have asked that cyclist to hang around while I switched lenses and hunted through my bag for the hood".
If I were to post a landscape shot though, I'd find comments like "an ND grad filter would have really helped there" *useful*, because chances are I'll be in that situation again sometime, and it's always nice to have some new things to try.
S
