I'm a lurker, I'd say for three reasons:
1. The introvert thing - somewhat. I'm not like super shy, but as silver described, I'm definitely the person who loves to be on the edges of the gathering, observing.
2. I don't feel like I quite fit in here. Not in a "poor pitiful me" kind of way, but because it seems like the active members here take a much more mindful approach to style/fashion/clothing than I do. It would never occur to me to seek out words to describe my style, or choose a term/color for the year, or have clothing/fashion goals. I kinda just buy stuff I like. I enjoy reading those discussions, but I can't really participate.
3. I haven't quite gotten the hang of some of the technical aspects of the board (though admittedly, I haven't tried very hard). There seem to be some established practices around posting pictures + links to items and I'm just not sure how to do all of that.
To directly answer Synne's question of what I get out of the site: I love looking at people's clothes and styling, enjoy Angie's blog, and was introduced to my new favorite store (COS) through this site, so this has become a regular stop for me. I appreciate the positivity here and the range of ages, lifestyles, etc. I don't follow any (other) fashion bloggers so this is where I can get a glimpse of new trends, new items, and how people - some of whom look more like me - are wearing them.