I agree with a lot of the points McMadCow made about criticism here.
I've also recently discovered Flickr and that has been taking up a lot of the time I spend on the web now. I like the fact that with Flickr there is no 'obligation' to comment at all, but when people do come across my photostream they can at least consider the photos in context. Rather than trying to simply assess a single shot they can see what else I've been doing, and that will hopefully help them understand what I'm trying to achieve, and where I've got to in terms of improving my eye. It is quite a release not to watch one of your shots reach the bottom of a page with perhaps 30 views and 1 or 2 comments, and with that sinking feeling realise that once it goes to page two the likelihood of ever seeing it again is remote! In fact one of the first shots I posted on flickr quickly become one of my most viewed and favourited, and I remember thinking that it received no comments at all when I tried it here - you can just never tell!
I'll certainly keep an eye on this site as there are a number of good photographers here, but it suspect it is going to take up less time in future.
regards
matt