Now that the NDA dropped I can reveal the secret: I am *not* in the Rift beta. I suppose that was a secret, because those who were in the beta weren't allowed to say they were, which only works if not being in the beta is also secret. ;)
Best description I've seen from Rift this far: "Warhammer Online done right". Apparently the class system is nice, but otherwise everybody is talking about how well polished the game is, not how innovative it is. I'll say more once I tried it out myself.