A long time ago I read a critic's treatise about how you haven't really watched a film until you've seen it three times. I think it was Ebert. Anyway that was decades back, and as I've gotten older I've come to agree.

Nothing reveals the nature of a film like repeat viewings imo. Films you might have had a positive experience with on first viewing fall apart on repeats, it's common. The strengths of the film, and the subtleties involved that escaped notice, become more pronounced and add layers of appreciation that weren't there the first or second viewing. This is rare imo. Most of the time flaws will become more and more pronounced until you revisit your positive experience/opinion of the film.