Squishy tanks... is it me or them?

[EaMett]

There are basically a few types of tanks:
- Those who understand that maxing packs comes from freeing healer dps uptime. They'll dps as much as they can while using defensive skills (cooldowns on trash, stunning some hard hitting mobs, trade some dps to use rotations that regen hp, etc..). Some take this too far an heal themselves, looking at you paladins (and some red mages). These same tanks usually do bosses in dps stance and switch the burden back onto you.
- Those who just try to dps through everything. Will use defensive cooldowns but that's about it.
- All the others, from clueless people to those who would rather keep their CDs for "oh shit" moments.

You'll get a feel for which is which pretty quickly. From there it depends a lot on classes as well.

PLD can take quite a beating even under-geared if they use their cooldowns and stuns properly. If they use HG on cooldown on trash packs you're golden, take good care of them on bosses.
WAR and DRK will make great use of DB and stuns (holy) to regen their HP.
And probably more I'm forgetting.