Congrats!
Not there yet, but I'm catching up. I binged the shows in the summer of 2004 (saw an unfortunate episode in 2003 while babysitting and almost wrote off the show for good--thank Interview with the Vampire for getting me obsessed with vampires and willing to give it another shot) and joined online in early 2005. And even post-cancellation, that's still piling on the years. I've migrated from a few boards. I signed up for this one ages before I was a regular. Then a bunch of other messageboards either went down or went down in flames due to the comics (bad years for a Bangel/Angel stan).
I have a long list of ancient personal fanfiction sites that abuse the Wayback Machine and a big folder of fanvids that I tried to salvage off personal sites, many of which no longer exist. And then of course, there's my gargantuan 4,000+ YouTube playlist. That's my craziest contribution to this fandom.
Definitely know all the big names and regulars in fandom. Some are still here ( ::waves:: ), while others have disappeared.
Now, my accounts on Star Wars and Indiana Jones messageboards are definitely hitting 20 this year. Yikes.