What makes a great tank?

[Rbstr]

I think, with AK, a lot of people are used to being able to just roll over it at this point. It's on the new(ish) players to say something about not knowing what to do IMO. For all a tank knows is that you're a secondary class or something, unless you get the bonus soldiery message.
The early level 50 dungeons can be horrible for new tanks since they can often be trying to keep hate from people with twice their ilevel.

For a dungeon run a tank needs:
To judge balance of (AOE) dps to what the Healer can handle to judge how big of a pull will work. Gear really comes into play here.
Where to position bosses and probably be on top of required stuns since you can't count on dps to even have stuns.
Gear that meets the ilevel reqs. Especially the weapon. If there's one thing you keep up on it's the weapon.

It really isn't their job to be the leader of the run, exactly. They just sort of end up with it by default. They might be new or whatever and not know what's going on. But they should be aware of their own limits.
I certainly don't keep cheat sheets on bosses or whatever but when you're leveling and doing roulette you do most things often enough to have the basics memorized.