How will aggro be on mobs?

[Delsus]

I can't say how the monster aggro in ARR (not because of the NDA, but because I was not in Alpha), but in 1.x there was variations. Sight aggro, sound aggro and sight+sound aggro. Don't go in front of a sight aggro monster, don't run past a sound aggro monster and don't go to near to a sight+sound aggro monster.

But that's no fun