I was originally on Sentinels Horde, then my guild moved to Moon Guard. So I was there for a little bit before moving to Wyrmrest Accord.
I, originally, played on Silver Hand upon release. Throughout various breaks and whatnot, I made my way to Moon Guard and played a Nelf Rogue. I took place in several of the various Council meetings that we had over there and I left some time ago. I'm not entirely sure what the RP is like there now, but I used a trial to log in a few months ago and I wasn't entirely thrilled with its state.
Either way, I've seen enough evidence to know that the RP here will be great and I can't wait to meet everyone =)