The very first forum I ever joined (that I can remember) was a band one. It's pretty embarrassing, so we shall speakth this no further.
The first forum I joined that I took seriously was a snooker one. I'm still on there yet I only really post during tournaments now, whereas before I was a definate regular. I still keep in touch with the people off that site, it will always be my 'internet home', but it got a new mod last year with whom I had a few.. disagreements. :dunno: So like I said, I only post there now during snooker tournies.
The first ever forum I joined was a Forumula one forum where all that was discussed with F1. As much as I like talking about F1 I got bored of it and now I'm not an active member of it, that was back in about 2005/06.
Pojo because I loved Pokemon as a kid and eventually played Yu-Gi-Oh for some time but their forums suck since they're full of so many little kids. I wanted a forum with better options for debate and serious discussions then BR recruited me. Call it destiny.
I won't name names. The first one I joined was a music forum, where it became impossible to post an opinion as the mods where power hungry and would find pathetic reasons to ban you if they didn't agree with you. My second was also a music one and I still check in now and then but it died...which led me here.
The BF made a forum a while ago, but it didn't stay active for very long because it was pretty much just family members and a couple friends and it just died out. That was the first one I joined, and this would be the second one!