Turnaround...
Day 16 - A movie that you used to love but now hate
Batman, the 1989 movie.
I liked it when it first came out, because even thought I thought Michael Keaton was an appalling Batman (and, even more important, Bruce Wayne), I was so relieved it wasn't Adam West, and the movie was fairly intelligent - possibly the only time I have liked a performance by Jack Nicholson. There were many things I liked about it, including the Danny Elfman score.
But as time went by, my tolerance for Tim Burton movies waned, and my standards for comic book movies went up. So: I loved it once, hate it now.