Why am I angry, you may ask? Is it because of the changes coming to Haste? No.
What about the increase in ease of reputation grinds? Does that anger me because I'm already exalted with everyone? Nyet.
Is it the fact that Level 1 toons will no longer start with food and water in their inventory? Unh-unh.
What about the fact that Miners will now be able to make Enchanted Thorium, instead of Enchanters? Nein. Here's what's pissing me off.
Brittle Revenants, quest creatures fought for the Sons of Hodir daily quest "Hot and Cold," no longer cast Shield Slam.
Fine, fine, you can all prance about happily. I'm sure the shadow priests love that. But the fact is, those stupid bastards taught me more about how to play as a Shadow Priest than any stupid battleground. I had to figure out how to get them dead before they would stun me out of my shadow spells.
See, I primarily use my shadow spec for running dailies. Lately I've had more opportunities to run heroics and some 10 man raids as shadow, because I have a few friends who want to try out healing. But I'm certainly no expert on it. I NEVER tried shadow until dual spec came out, and I figured I would give it a shot, since I have a slight addiction to dailies.
So, see, I never had a reason to use Psychic Horror, and I've been trained all too well during BC and Steamvaults to never ever ever use Psychic Scream.
But those little cobknobbers over near Dun Niffelem taught me everything I know about PvPing as a Shadow Priest (which, granted, still isn't much - but I have now defeated THREE PEOPLE in duels! Hurrah!!!! That's a big deal for me, shut it). I wouldn't even have Psychic Scream or Psychic Horror on my action bar if not for them.
So, I salute you, Brittle Revenants, for being such awful opponents, that Blizz decided you were just too much of a PitA for the people who hate dailies and hate grinding rep.
Much like most things that are difficult, you actually taught me how to play my class.