Have you ever read one of my favorite books: Project Hail Mary? No? It's about... uhh... a guy waking up and... hearing a voice. That happens on the first page, and... anything else would be a spoiler.
I tend to go with something along the lines of, "Oh my god, I love [movie]. It's pretty polarizing/It's definitely not for everyone, though." So far seems to set reasonable expectations and I've introduced a fair number of people to some movies they otherwise never would have seen and ended up really enjoying.
I mean the last time I did something similar (many many years ago) it just have me a stronger understanding that not everyone has the same experience as me, tastes matter, and that that's OK. It calmed me down a bit on gushing about stuff.