Ideally, as an actor, you want to disappear into a role, but there are some traits and mannerisms that simply can’t be erased. For example, if you’re left-handed, every character you play is going to be left-handed, because despite what the abusive director and unethical ancient teachers might insist, you can’t just beat the left-handedness out of people.
That’s not the sort of thing you would usually notice on screen, but some actors’ quirkier mannerisms or proclivities are equally unchangeable. Others intentionally adopt signature moves that are always part of their characters. We call those ones douchebags.
Not to put them in either category, but as Redditor Mammoth_Lychee_8377 and the rest of the internet has pointed out, Tom Cruise always runs, Tom Hanks always pees, Sean Bean always dies and John Wayne… “would light a cigarette off the top of an oil lamp”? Really? Huh. We’ll have to go back and watch those again. That is super specific.
They then asked r/Movies for more “actors who have ‘things’ they do in films,” and there wasn’t a single similar thing that their fellow Redditors missed.