Bosses that heal themselves can go choke and die in a fire with the developer that had the idea to put it in the first place. Yeah, I absolutely despise them.

How do you think the characters feel about them in almost every game considering they tend to quadriply, at minimum, their max HP?

Yeah ,it's unfair.

This happened to me in Skyrim.  I get to the end of story-line dungeon with an NPC escort.  Evil Skeleton Thing comes out, I start unloading on it.  Turns out I was just wasting my best arrows, though, because it was "invulnerable" until the NPC did something first.  Bah.

Reminds of Ragnarok Online, a patch made some of the MVP bosses able to heal themselves, I couldnt kill the Orc Lord or the Orc Hero by myself anymore. u_u

I like it, it adds more personality to the boss, or at least you know they're actually trying to stay alive. I hate when the upper gym leaders or elite 4 use hyper potions but I can't really blame them, I'd do the same thing.

Sooo when I made all those threads, everyone disagreed and made fun of me. NOW everyone is is having trouble and agreeing with this thread? Okay.   

Yes. Maybe. Perhaps. Could be your perception though.

Boss: Where are those TPS reports!?
Me: I thought I fed you through the shredder!

Bosses in games be like: "Well screw you guys with your extra lives or your phoenix down and sht!"

I like the extra challenge. It keeps you from just straight out tanking an enemy, you'll need a strategy no matter how high your Level is. I can think of a bunch of intense battles with regenerating enemies. Earning a victory feels just so much better when you do it close to death.