most people dont want to hear criticism.

i used to post critiques/suggestions but stopped because it was a huge waste of time. id take the time to write out constructive criticism and then id just get snarky PMs back about why i was wrong.  or id take 10 minutes to critique someones work and would point out something like the feet are floating 2" off the floor in their 'pose' and id get a response about how 'i know' - but theyre not going to 'waste the time to re-render'.

and then on the flipside you have people who post stupid preference-based criticism:   like you spend weeks working on some elaborate piece and theyll post 'great render, but her breasts are too small'. *
rolleyes*

the more i think about it, the more i believe the whole 'ZOMG WOW thats great!' type comments are just better for everyone all around.