From my own experience;
Tea
Dead clan, but it was the closest to an actual group of friends I ever felt in a clan tbh. It was a very fun experience, very good memories, made some good friends there. Fun times.
Lawedan
Either my first or second clan, worked very much like Bleu, as it was more of a training clan for new players who were then sent off to find their own clan. Nevertheless, I enjoyed being there, even tho at the time my computer was near death and I ever only got to play tb for a few minutes, I still had a lot of fun. The leader comes back occasionally, always exchange a few pms with him before he goes inactive again.
TLL
I probably regret leaving this clan the most. TLL was great, when I joined I already knew a few people and got to know even more while I was there. I still talk to pretty much everyone I met there. Real fun bunch.
Frost
My current clan, and def one of my favorites. I met these guys back in TLL since Fear convinced me to play PK showdown again. I met Pidda, Kazu and Slau, had a lot of fun with them. Spawned one of the greatest PK showdown matches ever known to man. After some time I decided to join Frost and it's been fun ever since. Got to know pretty much everybody in the clan, and enjoy talking to them on the daily.