I do usually put a link to the inspiration, but sometimes I question the wisdom of this, not wanting to rub anyone's nose in anything more publicly than necessary, unless they're being a d*ck about it.

Usually, I grow comments into posts when I agree with a post, and feel the need to elaborate on why. I like how it is useful for growing connections in my , and other's understanding. Sometimes it is similar to working on a puzzle, and having someone with an outside perspective jump in and put several major chunks together with just the right piece.