There are so many good suggestions in all the previous postings, I don't think I want to add more, since most of my feelings have been posted in one form or other.
There are some outstanding pictures, and then there are pictures where I have to ask myself --- why did they put it up ?
Often I feel like commenting on a picture, and do not do it for a simple reason, critiquing would be my opinion. I may see something wrong where others will find only positives.
I'm no expert, but I can appreciate a good shot. I do know the fundamental workings of the cameras, but have no clue about the tech stuff.
I also find people stay away from commenting on something they are not familiar with. This is particularly true with my Underwater photos. I have pictures posted on a different site (the one many members here went "Walk about" from). I like them and I know some are better than many I have seen in magazines, yet nobody seems to notice them. Mind, I had hundreds of hits and lookers, but no mention in any way. Is this because diving is not everybody's "cup of tea", let alone photography under water, which can be a challenge all by itself.
Then there are people like Brian (Tedz) (who blows me away with his creativity and wit) xNx, Fay, paveman, and many more who post pictures that can only be an inspiration to do better, but certainly not critique them. I have been reading "constructive"comments on other sites, and often I had to ask myself, why comment, there is nothing wrong with this picture. So, there it is, it becomes a very personal point of view.

This is a reason why I also like the idea of a high caliber type of photographer (s) giving constructive comments, like cropping, DOS and much more. He could look at the exif, figure how to make it a better picture and offer advise. I for one would appreciate that.

I feel that way with fashion photos or photographers using models. I have no clue about it. I won't comment on something I don't know.
In many way's I can carry my own. I may have to shoot a few frames before I get one I like, but don't we all sometimes?

Last, I would like to say THANK YOU Paul and your team for putting this site together. I know it is a tremendous amount of work you put into this site.
As a struggling photographer, who is also computer illiterate, I have a great appreciation in all the work you do.
With best regards Hans Swisschef216