I'll start. Fot some autistic reason, I always explore way too early. And I don't mean 1-2 levels early. I mean, that if the game allows it by any accident, I will explore the end game even if I would get one-shot by the aura of these characters alone.
And I mean... I do it every single time. In WOW, I was about level 30, when I found entrance to a capital city of opposing faction. When I played V rising, I explored almost entire map as a mouse. When I played Palworld, I just flew around ...
So, why do I do that? Because good loot and traders are hidden in endgame. And not all chests are bolted down properly. In V Rising, there are bosses that fight among each other. All I need is a good time, and tada.... I have high tier V blood. In Palworld, I got a rare pistol blueprint much sooner, then I unlocked the original one. All it takes is that one chest, that won't be guarded for a few seconds.
But... I am fucking ruining the game. I hate this over-optimalizing brain sometimes. But the rewards for this hours long bullshit are just so funny. 
Do you have any gaming habit that pisses you off?
@LukeAlmighty this one doesn't piss me off but it is kind of funny... I always try to break games. If I notice something even a little bit off I will go to great lengths to break it. Exploits, skips, going out of bounds on a map, etc