Warrior is never boring. I'm playing a hunter and not a warrior for pvp because I don't feel like getting raped by any noob playing a frost mage or hunter, which hardcounter pretty much all melee.
Imo, ret pala is bad at pvp because it's lacking gap closers (no, that burst of speed when you judge is hardly enough), it's squishy, his burst is very easy to counter, has no counters to spammable cc like warlock Fear and Sheep other than trinket and bubble (though if you blow bubble to get out of a spammable cc, you lost the duel right there) and his defenses are purgeble by anything that has an offensive dispel.