You remember the bunnyhop? Ingrained in your muscle memory from the 90's era multiplayer FPS games? Only useful for old styles of FPS, and usually only for multiplayer at that?
I did that all through Half-Life 2. And, perhaps worse, in Amnesia (I also held the run key through the whole thing- thanks, Pokémon!). And Minecraft. If I can jump, I'll bounce through the whole game. Just feels better.