Personally, if it's with a friend, I don't mind playing that kind of HP game. We make fun of each other knowingly and do that kind of jab all the time!

But in roulette or anything involving people from all over, I'd rather not play that kind of game. If I know a dungeon really well and if I see that the tank can take a couple hits without too much of a dent from a group of four or five, I'll focus more on DPS and less on healing; Eos can sufficiently heal tanks like those, and I'd only step in if it's getting around 30% of their health. If it's a dungeon I don't know well at all or if I'm playing with a new tank, I'd rather be safe than sorry and make sure they're always above the half-mark. In all runs with roulette or party finder, every other player is usually a stranger and I don't want them to panic if their health starts getting a little too low.

I've played at least one of each role and in the time I've spent as a tank, I understand that healers shouldn't be afraid of the tank's HP going instantly zero if they so much as tap on Broil II. However, I'd like to not be given a reason to panic when my HP goes low - it's mentally uncomfortable. As a healer main, I try my best to make sure my tank is sufficiently comfortable in combat for that reason, LOL