Go with something not many play, and get good at it. Hunters are obviously a dime a dozen. And there are a few dozen too many of them around on both ally and horde currently. Try a lock/druid/mage/priest. They don't seem to be played as much as other classes. Disc makes an excellent FC, plus does about as much damage as shadow if you use penance for offensive purposes. Locks are highly effective despite the negative stereotype surrounding them, don't believe me I got screenshots to prove it. Druids are probably the best FCs though for obvious reasons (speed, hurr durr). And mage is just a blast (arcane blast). Probably my favorite class at 20 for the insane burst, polymorph, slows, aoe, blink, etc. Just get used to dying a lot or setting to /follow on a healer, we're so SQUISHY!