I happen to prefer OT than MT, since you're doing much more than standing there and taking damage. However, I don't usually que for WoD as tank because I need gear for my alt jobs, and it has come to my attention that the majority of the tanks that do 24x raids are idiots who only want to measure their aggro epeens and have no interest of contributing to the success of the raid. While I understand what you are trying to say here, anyone who's going to fight over aggro on bosses has no interest in doing anything else.

Also off topic question; does DR skills really reduce damage taken from cover? I don't play PLD much.