In my experiance of Internet forums like this, you see a core group with long experiance / lots of posts, a group that may have long experiance but relatively few posts, and newbies who ask a quick question or two then bug out.
I would consider myself among the first group, as well as you, old2soon. Jess, DDT, and some others (and if I didn't include you it is not intentional / not to be taken as a slight

).
Lots of people in group 2 are the type that come here to read, and once in a while, something inspires them to post.
I call alot of group 3 the "Hit and run" - they ask some questions , get their answers, then we never hear from them again. Sometimes they are so rude as to delete their posts / threads (if the moderator lets them) - a practice I'm not too happy about - I feel that all questions should be left as a reference for history / so other people can benefit from the question being asked. I also feel that they should at least acknowledge the help they have been given, but most of this group is grab and go.