I've played card games for years, including old5r, and I must say that I've never seen a game come out of the gates with such great variance on deckbuilding and playstyles with such a limited card pool.
I mainly play Dragons and after quite a few games with them and getting pretty decent, I decided to try a few other clans out. I learned quickly that what works for one clan doesn't necessarily work for another. Each clan has a new playstyle to learn and a new deck to tweak....and I absolutely love it.
Dragon is definitely my main, which I'm sticking with, but I'm learning to play everything in casual matches...there is no better to know your opponent's strengths and weaknesses than to walk in their shoes.
Love this game. It's chess, while other card games are checkers