I admit that what first drew me there was greed. I heard that it was the richest source of mining nodes for the faction that controls it (as well as Eternal drops.) I was only level 73 when I first zoned in and knew I was going to get pwned by all the level 80s running amok, but to my surprise there turns out to be a feature that levels the playing field: siege vehicles.
Hoping into a catapult or manning a tower cannon eliminates the level difference between you and your opponent. In no time, I was laying waste to the enemy and racking up the Honor Points. I was suddenly having so much fun that I forgot to look for mining nodes (which is good, since the roaming mobs in the zone are level 80.)
Now, when I log on, the first thing I do is check how long until the next Wintergrasp battle starts (two and a half hours after the last one ends). For those who haven't tried any kind of WoW PvP I recommend trying your hand at piloting a Demolisher in Wintergrasp at least once. You may find yourself enjoying the game in a whole new way.