If I had to rank them, light novels would always rank first. Second place would be a bit harder to choose, but I'd probably have to pick anime. Thus last place would go to manga.

Light novels generally have a much faster update rate and also a whole lot more content. Mangas are generally more of a summary of the story. You'd see more than 5 light novel chapters that each take 5-10 minutes to read compressed into a single manga chapter that takes less than 5 minutes to read.

I actually enjoy all of them, but I'd say it really just depends on the situation. It's like how watching a movie after you've read the book can be really disappointing.