Name annoying things that people do on certain Classes/Jobs.

[necrosis]

ANYONE who runs around like a beheaded chicken when they take aggro. Job does not matter.

[Marael]

ANYONE who runs around like a beheaded chicken when they take aggro. Job does not matter.

This so much. I see a lot of people saying Bards, but dudes and dudettes, in my experience, HEALERS do it FAR MORE OFTEN.

White Mages who think they are DPS and blow all of their MP on holy spam and then demand ballad because they have none left for healing. You know, the ones that ignore the entire reason their job exists.

Anyone who AoEs when there's only one or two targets where single target spells/abilities will be far more damaging and effective. And I'm not talking about the BLMs who use up their remaining bit of MP on a flare before popping transcendence or convert. I'm talking about the BLMs that fire/bliz 2 everything, the bards who rain of death incessantly with TP song up no matter what they're fighting, and so on.

Bards who don't use blunt arrow... at all. Or those who use it for extra dmg on fights where it's needed to silence something.

Bards who refuse to play songs, even when asked, because it cuts into their DPS.

Trolls. Period.

[Gramul]

ANYONE who runs around like a beheaded chicken when they take aggro. Job does not matter.

Just this really.
It's not just going to stop attacking you unless I can get its attention.