It all depends on the player. I for one tend to stancedance alot to and form all three stances. And when it comes to which talenttree to focus on, you will probably get many answers. I lvld my warrior form 1-70 arms/prot specced (wanted last stand), but the majority suggests lvling in fury.
Although in endgame it changes. It depends on what you want to do. PvE as tank or DPS, or would you rather do PvP? I highly recomend the MS/fury build for PvP. fury for DPS PvE and of course Prot as Tank.
But you should check out the stickies ontop of the warrior forum. Enjoy your warrior :D