Same. Used to moderate the official vbulletin.org with some good people. This got me started in my career and I would not be where I am today without all that time spent learning the internals of vBulletin. Of course, it's a shitshow nowadays after the company took it over and the majority of good people (including developers) created XenForo. I have not been involved for over a decade :)
That's amazing. I spent a fair bit of time on vbulletin.org (I think) back in the day. Wasn't a huge poster, but lurked a lot and remember reading Kier's posts.
Same here! Originally phpBB, then IPB 1.3, then vBulletin. Good times. :)
I was entirely obsessed with this space when I was a teenager/young adult. I would search out and try every forum software I could get my hands on, and of course (because who didn't) made my own.