Just for fun I pulled my old 72 DK out, respec'ed him for frost tanking to speed up the queue and tanked the first WOTLK instances, so much fun. I could never quite grasp Dk tanking until now. Its kinda scary if people pull aggro and all your runes are on cooldown. I didn't have any heirlooms on him but I had little trouble holding aggro even with a suicidal firemage doing blastnovas and dragon's breath, although I told them to stop.
I"m tempted to try blood tanking, is that a good one for 5mans ? It seems AE threat is weaker in it, I'm wondering if DnD and Blood Boil are enough, especially for someone new to the rotation/build. Frost was always my favorite and with HB I have little trouble unless I mess up.
No one waits for the tank to establish threat nowadays, so glad they're bringing back CC and cutting down on the huge AE pulls, it's kinda dull pulling a group, holding aggro while everyone spams AoE.
HoR only sucks if you're not a pally tank or have an incredibly stupid group.