I don't mind sacrificing Raw Intuition for Fell Cleave, because it's rarely a necessity. I mind sacrificing Vengeance for fell cleave, because that's a really good mitigation tool I might need later.

I also oppose anyone that says "real tanks don't even need tank stance, they can do everything in dps stance", because random PUGs are always demanding that you pull as many people as possible, and that is not something you can do in DPS stance.

*Mobs will outlast all of your cooldowns combined.
*Mobs will deal significant damage, even with cooldowns up.
*Threat tables will be unpredictable, because you can't tell who's getting hit by splash damage and who's being burned down by single target DPS.

And then there were all the times I died in A9 because the healers didn't know just how big the main boss could hit.