Of Tanking and WoD

[Docent]

Anyroad, I just typically assume I'm MT. If will run up, watch the map, make sure players are all in the arena (ready Checks are too slow) I'll take a pause to see if the other tanks are running in, but not a long one, before I just charge in myself.

I'm the same. I don't give very long for other tanks to "volunteer" as tanks -- If everyone is past the zone line before a pull, I'll let my healer know and charge ahead. Most of the time I'll default to main tanking the whole place, despite how much I hate tanking Cloud of Darkness and Cerberus.
Because of this, I tend to ask people for the "all dps in" method, because I'll me main tanking no matter which alliance I'm thrown in, and won't get myself mini'd and eaten in such cases.

If somebody does pull threat and seem to want to MT, I turn Defiance off, make sure hey have full threat, and then wheel around to the side to avoid getting cleaved.

That's where you and I differ. Personally, I'll see it and take it as a challenge. When that happens, I'll usually have a threat-battle with 'em.
If someone asked me why I do this, I wouldn't really know the answer. By thinking about it for a second, I suppose it's because another tank is probably the only thing that can provide challenging enmity to benchmark against, so it's making me naturally try and see if I can match/beat it, despite the risk involved (spinning the boss, getting us or others cleaved, etc.)