I can certainly understand being in awe of the talent here. But I can see no reason you should be... your work is outstanding. However, I would encourage you to comment on other people's images. We have a couple of people who "post and run", rarely, or even never commenting other people's postings, and I know that there are a few people (and honestly, I have to count myself in that group) who find that it a bit one-sided. I know most of us appreciate acknowledgment, and a quid pro quo seems appropriate.