Also, remember you don't NEED a clan. A lot of people in the game are clanless and perfectly happy that way, some of them even end up being "e-cool" all by themselves.
Some clans you might think are "e cool" might not be also, and there may be a bigger reason that the clan stays together. Like, from what I have seen the RAWR people are pretty tight with each other, but most of that stems from their history on the forums and, from that, they have achieved "e cool" even if they wouldn't ever call it that. Plus they are pretty damn good at Toribash as well.
No matter how you slice it, clans that last a while tend to be more exclusive in who they allow in. And you will notice that a lot of the "cool" clans barely play the game anymore and mostly stick around for the community and the friends they have made. But, nothing gold can stay, the top clans when I started have mostly gone inactive, and those are the clans I really wanted to be in at first, as it happened, I ended up in a clan I had never really considered being a part of, but that has been around longer than most and is still active, and now I cant really bring myself to go anywhere else :3