When I have time, I look through What's New without filtering it.  I avoid looking at stuff that obviously been slapped together wihtout thought. I will look at Photographs and Fractals, but not comment on them  because  I  have no way of  knowing what's good or bad in those catagories. I will look at any 3D render.  I lke to comment because I remember the thrill I got from the comments I received for my first render.  From time to time, I go through my gallery and click on the galleries of people who commented on my work so that I can return the favor.  I think it is very import for artists to comment on each other's work because I've found that most other people are simply to busy to bother with art these days.