Who tanks?

[Keldon]

The easy answer is to check who's in tank stance vs dps stance. If no one is in tank stance either step up and be the MT, or if you're new/don't know the content, maybe ask one of the other tanks if they wouldn't mind MT'ing. When I run stuff myself and the other tank(s) aren't in tank stance, I usually ask "(name), do you prefer to MT or OT?" and that either gets a "I'd prefer to X" or a "which would you prefer?" response

[Terkhev]

if you're new/don't know the content, maybe ask one of the other tanks if they wouldn't mind MT'ing

While it's natural reaction, I'd say opposite should be the way to go. Outside of savage content, MT doesn't have to do anything. OT on the other hand needs to do some important mechanics in few fights, especially now with normal raids roulette.

Personally I try to adjust to sync and players. For example if I'm on lvl 50 WAR I'll try to MT because of no Deliverance and OT when I'm on DRK. If I see other tank(s) are PLD I'll pull.

[udubdave]

While it's natural reaction, I'd say opposite should be the way to go. Outside of savage content, MT doesn't have to do anything. OT on the other hand needs to do some important mechanics in few fights, especially now with normal raids roulette.

Personally I try to adjust to sync and players. For example if I'm on lvl 50 WAR I'll try to MT because of no Deliverance and OT when I'm on DRK. If I see other tank(s) are PLD I'll pull.

While it's true that the OT has to deal with mechanics that the MT doesn't, sometimes it's easier to OT if you're new to the encounter because it gives you a better sense of the fight and what's happening around you. Then when you MT it, you'll know exactly what to expect.