The ooohs and aaahs can encourage people to do more and better renders. I agree with maxxxmodelz. Ooohing and aaahing over an image gives the artist the impression that he/she is doing everything "right" and doesn't encourage growth. A piece of carefully worded constructive criticism helps an artist do better renders. Let's say you posted an image of the first hair that you postworked. Which comment would help you more? "Wow ... that hair is FANTASTIC!!! Man, u rule!" or "God, that hair totally sucks! You better not quit your day job." or "You mentioned that this was your first try at hair postwork ... you are off to a very good start, but it might help improve the image if you vary the colors a bit more. Try building the colors up in layers and blend them in by adjusting the opacity of each layer." What do you think?