I only saw 3 movies this year, so I don't have much to go on.
Godzilla - A pretty good monster film, it suffered from its sporadic cast more then anything else. Bryan Cranston delivers an excellent performance, as usual, but just about every other actor drops the ball. The monsters were done excellently, as were the fights.
Guardians of the Galaxy - An excellent movie all around. Good action, good effects, good acting, good story. It suffered slightly in pacing, but this was mostly a result of being an Avengers movie, without the preceding individual movies for each character. Besides the rough hitches resulting from such a large cast with accompanying back stories and resolutions, is was a pleasure to watch. As far as pure entertainment goes, GotG was the best movie of the year.
Fury - Just saw this yesterday, and was quite refreshed by it. It was less a movie, and more of a picture - the characters are static - they do not change as the movie goes on, you simply learn more about them. The war doesn't change doing the course of the movie either - you simply see more of the battle scape, more of the horror. The action scenes were fantastic, and while there were some minor historical errors (Most to accommodate cinematic flair), it was very faithful to history. My pick for the best movie of 2014. It may not have been the most entertaining, but it was noble, and well done. And perhaps the best part of it was that Shia LaBeouf was actually very, very good.