I see that some people have expressed a feeling of inadequacy so far as their own images are concerned and that they feel awkward about giving critique on images that they deem better than their own.

I'd like to say that if this is to work, the critiques have to be recipricol and go both ways, not just sign up and sit back and let others do the work. The idea is to learn and grow and improve ourselves and our techniques, but it's also to help others learn and grow and improve theirs and they can't do that without hearing from "you" :)

We all know what we like and don't like, and most of us have an eye for what looks "off" or for what works.  Some images cause us to feel emotions of some kind.  It's important that those things are relayed. It all helps.

So far as the critiquing goes.  I think it would be helpful if when you point out flaws or things that could be improved that you try and suggest a solution or point out a tutorial. I know that won't be possible in all cases, but it would certainly be helpful.

Also, it would be helpful to also hear what about the image works. Regardless of how well you accept criticism, constantly hearing only the negative can be a real blow to the self esteem.  So point out what works and what doesn't.... to provide a balance and to give the person hope that they aren't a total duffus when it comes to creating.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi