Do you ever notice whether you're actually *enjoying* the laugh, or just going along with it?
I think the real split isn't personality versus exposure - it's that exposure shapes your personality's sense of humor in the first place. Like, I grew up around pretty deadpan people who'd crack jokes that landed only if you were paying attention. Now I find subtle, almost invisible humor hilarious, while broad comedy that spells everything out feels exhausting to me. But that's not some innate thing I was born with. I got trained into it. Meanwhile my friends who grew up in louder, more performative environments genuinely light up at physical comedy and absurdist stuff that makes me uncomfortable. We're not different *types* of people - we just marinated in different cultures long enough that our brains now auto-respond differently.
The thing that messes with this is that sometimes you do cross over. I'll see something from a completely different corner of the internet that hits different, and suddenly I'm cracking up at a meme style I'd normally dismiss. Or I'll realize I've been faking laughter at a certain joke type for years just because my group does, and when I finally admit I don't find it funny, nobody cares. That's where personality actually matters - whether you're willing to admit when something just doesn't land for you, or whether you'll keep pretending. The exposure part is automatic; the personality part is what you do once you notice the mismatch.