Which tank generates more hate/aggro?

[Adire]

While we are talking purely on aggro generation here, I would like to point out that out of the three tank classes, I personally consider the WAR to be the weakest actual "tank" of the three. I've healed all three in higher level content, and I've never once had issues keeping PLDs and DRKs alive in big pulls or long fights, but WARs tend to have defenses akin to paper since most players prioritize pure STR builds to maximize their DPS with WAR.

WARs do have fewer on demand defensive cooldowns, but the most consistent mitigation skill (inner beast) that WAR's have is easy to save and/or work in if extra mitigation is needed. I say most consistent because as long as you have 5 stacks in Defiance, you can use it whenever you want or need to, no cooldown timer is on it. And if push comes to shove, you can extend it to effectively 10 seconds on demand with Infuriate. Inner Beast is also a hefty self heal, especially if STR specced.

Defiance's HP boost and healing received boost make its passive (indirect) mitigation technically on par with the others though. Add Storm's Path onto that, and you get extra, direct mitigation. If it's needed, WARs can put it up. It's particularly effective on bosses.

A STR specced Warrior will actually suffer less than the other tanks too, due to WAR's inherent higher HP. More STR also means bigger self heals for WAR, which is really better than just having more HP alone.

The only time WARs are super squishy is when they're in Deliverance, which typically isn't for long, and if a WAR can afford to do so, is when one or more cds should be popped.

WAR's don't have less mitigation, their passive mitigation is just indirect and their cooldowns are just more important to use correctly. WAR's just can't sit back and do nothing defense wise as easily as a PLD can. But their potential mitigation is on par, and as I said, their passive mitigation is just indirect and not as noticeable for a healer. It's just easier to get nervous faster with a WAR due to their health dropping faster. But the 20% healing boost is there.

I actually get more nervous healing DRKs than I do WARs.