There are good movies, and there are movies you enjoy.
They aren't always the same movies. A film could have great actors, great effects, phenomenal directing, and a wonderfully-written script. It can win Academy Awards for being such a great movie. But that doesn't mean people will enjoy it.
You can recognize and respect the fact that a movie is good, but you most certainly don't also have to like it.
This, of course, leads to a few questions: are good movies good because they're good from a cinematic standpoint, or because people enjoy them? Do they have to be cinematic and enjoyable? What about movies that you know are good, but you aren't sure you understand? I've seen quite a few of those lately.
Of course, there are also movies that are enjoyable because they're bad. But that's a different (though larger) ballgame.