Originally Posted by
SyzzleSpark
It depends. WAR is definitely the most pug friendly tank, since you are capable of self-sufficiently maximizing your performance no matter how poorly the rest of your party plays. It is the least needy job in the game and so people that otherwise play very poorly (NINs that don't Shadewalker, ranged that don't Quell, a fellow WAR co tank that spams BB, or a SCH that doesn't hop out of cleric to shield for busters, for instance) will think you are just the bees knees.
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TL;DR WAR permits your group to play poorly as a team and ignore a lot of their utilities, whereas the other tanks force everyone to use their tools to the fullest if they want to get an optimal run.