This came up in another thread, but it is an interesting topic, and I thought it deserved a discussion of its own. I was wondering why people post in Critique, and what they hope to get out of it. And why others chose not to post in Critique.
For myself I write alone, and, for the most part, do not socialise with other writers, so it is an opportunity for feedback. I do find the technical advice thought-provoking and suggested tweaks can be helpful, but the question I really want answered is, is it funny? Partly this is because I am never entirely sure that an individual sketch is going to work (and I am often astonished as to which are well received and which are not); but I am also posting in the hope of positive feedback which is going to encourage me to continue. (And if I am crap, I want to be told that as well, as frankly there are other ways I could be spending my time.)
Writing on your own, it is easy to lose confidence in yourself, or indeed to become deluded as to the quality of your work.
For those who have writer friends, whose opinion they trust, with whom to share their work, that's terrific. But otherwise I would recommend posting a few pieces in Critique and exposing your work to the objective scrutiny of strangers. It can be eye-opening.
Also a few more people posting in Critique might make it more interesting for those doing the reviewing.