Personally, I strongly dislike it. Every aspect of every film is way overblown there.
If there's a funny scene in a movie, they LITERALLY die laughing and wake their whole neighbourhood up.
If there's a scene that is in the slightest bit sad, they're going to cry their eyes out for months.
If there's a movie that's decently good, then it's an absolute masterpiece and the best movie of the decade.
And so on... Everything is always really exaggerated.
On top of that, there's always the circlejerk hivemind aspect. Threads are closed after 6 months, so the whole discussion about the film is divided between many threads, but because every thread is small and new, you often get the same fluff comments.
For more popular flims, it is the absolute worst. With half the thread being just funny quotes from the movie with no additional commentary or anything valuable, yet having thousands upon thousands of upvotes. It's kind of sad.
I used to go to IMDb boards, –which, admittedly, had their own issues– but they were still pretty useful for discussion. And shutting people up wasn't as easy as it is on Reddit, so the opinions there were much more varied. However, since they shut them down, Reddit is the closest thing I've found. Moviechat.org is supposed to be a replacement to the IMDb boards, but it's pretty inactive.
So, even though I kind of despise r/movies, I'm sort of forced to use them. But reading it makes me somewhat bitter.
What about you?