I agree with alot that is said but then i have my avoidence set on most times and i have been praised for this due to survivability. Not only do i not get hit often which means less heals required but it allows for the ot or mt to recover and be healed.
I have tanked with stam stacking tanks and i watch them get hit for twice the amount i would be hit for and the healers hate it because of the fear of OOMing.
i see all the points but as a tank i still feel avoidance plays a big part in the tanking world. EH is also a big part don't get me wrong. I will actually have to figure my EH out any good addons that can do this.
I feel for druid tanks that go for the high hp like 40-50k hp and just drop, i laugh on the inside and think ok what is your avoidance, because you get hit by magic yes but there is normally malee swings after and they always get missed in dicussions.
ppl laugh and worry about my hp and then they run with me i am normally the one that will be getting compliments. the dps that laugh at me and the other tanks don't laugh when i am left to tank bosses with two dp and maybe two healers and we kill the boss.
so from harbringerau avoidence should be brought to the thoughts of all tanks. Not just the HP Numbers doesn't count if your dead.