I usually post recomendations on this sub , but writing mandatory 300 characters is a challenge. Still somehow manage to write , talking about movie plot , cast and performance.
Recently people have just skipped the description part and choose movie trailers in the link. The sub is filled with it.
I still prefer the self posts , but I think writing 300 characters challenges laziness in people. Ans some start joking on the description made by OP if they don't like the recommended movie.
You can't force people to post in one particular way , but too many same kind of posts makes this sub more for karma collector than quality posts