[Smilkers]

Did the raiding thing during Vanilla (Molten Core, Onyxia, Blackwing Lair).

-Molten Core just requires a lot of offtanks and some very simple timing. It's basically a snoozefest until you get to the final boss. And then resists are all you need to kill him. The final boss encounter is pretty cool your first time though, I will say that... (however, I have read the encounter is somewhat bugged on ED).
-Onyxia is a snoozefest if everyone has resists, but again, cool if you've never seen it.
-From what I read, BWL on Emerald Dream has broken encounters, so you won't even be raiding there legitimately.

Two of the battlegrounds (Arathi Basin, Alterac Valley) are the most fun that you can ever have with WoW. The 3rd battleground, Warsong Gulch, usually just turns into a turtle-fest where no team ever actually captures a flag.

In summary, not worth your time unless you're really craving some overpowered PvP as a Warrior or Hunter. They rape every other class (with the exception of Warlock maybe for Warriors)... incredibly unbalanced PvP overall though.