I'm probably an "against the grain" lurker. I signed up over a year and a half ago, and I don't have that many posts. I've been out over 12 years, and don't believe for a minute that posting on here is wrong, nor am I shy. I signed up because I had something to post (don't have a clue what) and I had to be a member to post. When I have something to say, I say it. When I don't, I just don't post. A lot of the time it is because someone has already said what I was going to say, and I hate redundancy.
In addition to this site, I also belong to a parenting website, having joined almost 8 years ago that I visit daily. With the exception of an ongoing thread with actual people I've met, I probably haven't even made 100 posts in the 8 years. I guess lurking is just part of my online personality.