I'm always telling people to REALLY watch Napoleon Dynamite. I think it got quoted and proto-memed to death when it came out, leading to most people having an unfair idea in their head of what the movie is.
The soundtrack is phenomenal. The acting is (mostly) way better than you may have thought it was. Jon Gries (Uncle Rico) was nominated for an Independent Spirit award and he absolutely deserved that nomination. The cinematography is excellent, especially knowing how much it cost to make + how much experience the crew had. Though it's not explicitly said, I think it's ultimately a story about neurodivergent people finding friendship, solidarity, and happiness in a world not made for them.
Also, the scene where Uncle Rico throws a steak at Napoleon is still funny.