That's cool I do to there's a lot to learn form others! I like the feedback exchanges. I think its also fun when people do mini poll's on their artworks looking for their audience to make decisions so that everyone has a collaborative spirit. Puts more love into a project and people can be more invested in the piece on a whole.
Like when some people put up journals or posts on what they are doing and share the process to completion, or even do polls or journals leaving it up to the audience on what they want to see in a piece. It can range from simple art to tutorials.