I find it really interesting how class roles, originally created completely by Blizzard, have been given their own flavor by the people who play them. Take a main tank role, for instance-- sometimes it's the raidleader (although it doesn't have to be), but usually it's someone dedicated to the success of the raid, a person who likes getting their hands dirty, is super knowledgeable about both the bosses and their own gear, and both supports and benefits from (in the form of gold for repairs or first choice on equipment) the entire raid. The main tank (just like the top DPSer or the main healer) is a position created partially by Blizzard, and partially by the people who play it.
Donaven (quite randomly) calls today "Thank a Tank Day." Unfortunately, he himself is a tank, so the actual proclamation sounds more like whining about being a tank rather than a sincere thanks for a tank who knows what they're doing, but the thought is noble. Instead of just thanking tanks, how about we thank all players who take a role and fill it out to the best of their ability-- who take a job, whether it be grabbing aggro, laying down damage in the right places, or playing the whack-a-mole game of healing, and do it well and without question.
For all the QQing about PvP and all the crying about how Arena is unbalanced, the best times I have in this game are in PvE situations, where everyone is working together and doing what they're meant to, all the way until the boss' health reaches zero. The main tank plays a huge part in that, by standing where they need to stand, and laying down sunders when it counts. But when a raid is really working together, everyone does what's needed, and that's when it's really great. I'll thank everyone for that.