Oh yeah? Which one?

That's a story that never gets old.

So this seemed like the most appropriate place to ask this, and it's for anyone who wants to answer it.

Is there anything about some boss fights that you just find completely off-putting in a video game? Like, what makes a bad boss fight for you personally?

I hate any boss fight that takes longer than 10 minutes from start to finish. My ideal boss fight is something out of Gradius or Cave Story: fast-paced, cool, and memorable, without having to rely on inflated hit point totals to be challenging and interesting.

I dislike two kinds of boss fights.

1) Any boss I feel is just plain cheap. This usually involves things like knocking me off a ledge at the beginning of the battle or infinite stun lock from a move that is extremely hard to avoid or similar crap that just makes the fight not fun on a boss that can take a few dozen hits from your character.

2) Boss Fights with lots of little annoying minions that actively get in your way. I'm not talking about metroid or castlevania where the enemies are a small threat there to replenish your resources in a pinch. I mean battles where you have to spend a considerable portion of your time fighting off smaller enemies while the boss is still attacking you but not taking any damage. Especially bad if the enemies respawn.

Anyone with cutscene at the beginning. Bonus point if it's unskippable or requires interaction.
That is, assuming they are moderately challenging.

Any boss that is too easy.

Oh hey, welcome to half the raid bosses in World of Warcraft.

^^ I fail to see how those take up a considerable portion of all of your time on every raid boss. But if they literally do for every player involved in the raid, then yes, that is a terrible boss fight.

Well, let's take a sample. In the most recent tier of raiding (14 fights) you have
1) 50/50 between adds (the little guys) and boss. Both are not up at the same time: the boss stops existing, the little guys come out, and then when they're done the boss comes back
2) Three "bosses" at once, each of which will, twice over the course of the fight, summon one or more little guys you have to deal with.
3) A fight where you spend basically all your time on little dudes, some players selected [At random|by the group] being able to turn their attention on the boss (but the damage the little guys take is mirrored on the boss)
4) A fight where you pretty much just go after the boss unless your party has no idea what they're doing and gets mooks as a penalty for failure.
5) A fight with two phases -- one with no real "boss", just endless waves of mooks, and one with basically just the boss (and cleaning up leftover mooks from the first phase)
6) A fight with one boss you spend most if not all of your time on
7) A fight with a pair of bosses you spend most of your time on.
8) A fight with a boss who constantly summons swarms of reinforcements that you must deal with rather than the boss
9) A fight with a singular boss and no adds of any kind
10) A fight with no singular boss whatsoever and tons of mooks
11) A fight that oscillates between dealing with the big angry dinosaur and dealing with the little angry orc (but when the orc is out you still have to not die to the dinosaur)
12) A fight where most of the people fight the boss most of the time, but a couple players have to manage other stuff
13) A fight with nine main bosses, three of which are fighting at any one time, and one of which (one of the nine, not one of any three) will occasionally call up a little guy that must be killed
14) A fight with a big boss who... Summons waves of mooks that need to be killed or left for the fact that... two guys appear and at least one must die: each of them kills everything in half the room after a few seconds (including the little guys). Later he makes axes happen (which must be damaged or they leave a hurt zone on the battlefield), possesses party members (who have to get beat up to bring them back to sane), and teleports to a place where you need to kill mooks to hurt the boss again.

You can decide for yourself whether that would be really too much.

You make it sound so appealing.

Some RPG bosses can get pretty bad with the inflated life totals thing. You get into your groove and figure out when to attack and when to heal and then... well there's no more decisions to make for the next ten minutes. You just have to hope the boss doesn't get a critical.
Any boss that has you dodge dozens of attacks just to give you a narrow opening to go on the offense that you can easily miss.
Any boss that's just a basic enemy with enough hp to set it apart. Bosses should be special.

oh no tevish are you tricking me into playing WoW again

Honestly though, Blizzard is quite impressive when it comes to boss design. It also helps that your attack patterns are actually sort of engaging.
I got a lot of appreciation for them after playing Guild Wars 2.

For number 2, it immediately reminded me of the Ochus of FFXIII.

Right now, it's essentially every other big random enemy encounter in Dragon's Dogma.

Super hexagon just takes a while to get used to. The first fifty times you play, you'll die in the first 15 seconds even on the easiest difficulty level (which is labelled "hard"). This is also true for the first fifty times you play a level where the rotation speed is different to what you have experienced before, since your muscle memory has to readjust.

However, after that it's a pretty fun game. It's not all about memorizing the patterns. You do have to think on your feet a lot and there are moments when you'll be like "I can't believe I survived that". I've played for about seven hours total on steam and a bit more on my tablet and I've beaten every level except for hexagonest hyper (hardestestest mode)

Any game not named Magic: the Gathering or containing those words.

So many games contain "the"

And "Magic"