@Darkglass - I don't know about some of the others, but constructive criticisms on my artworks / photos / whatever are ALWAYS welcome. One of my favorite commenters is Mark (Anahata.c) - the guy sees stuff in my work I don't even see until he points it out. Complimentary, or constructive, it is a valuable source for improving my work. There are always ways to improve. And I love it!

"I reject your reality and substitute my own" - Adam Savage