Google.
I literally found it by searching for pokemon forums on Google, back in 2004. I had full intentions of joining some forum when I executed the search too, I was just looking for a friendly enough community. Serebii failed, PE2K failed, Bulbagarden failed due to the fact it was smaller back then. I joined PC, and I seriously don't look back and regret that choice, I've made good friends here. Not to mention that it's not so small that I'd be handed responsibility out of the blue. I have fun here. :D
It's true I've always wanted to help PC, but I've always felt, since I joined even, that earning that right is more satisfying than asking, and just getting it with no questions asked.