Topics
I'm with Phoenix. I read a lot of posts, ask a lot of questions, but only respond when I hope I can contribute. Often, especially with computer stuff, I read the posts, even when not specially relevant to me, because I find computer threads are interesting in general. But lots of times I don't respond to them, because the knowledge level is way beyond my computer expertise.
In short, by reading most of the computer threads I have acquired a
lot of useful knowledge, so I consider it well worth my time to check them.