In this order:
STAR TREK (2009)
Why? This brought back STAR TREK in a vibrant, exciting way. It reinvigorated a franchise that had become stale as a week old baguette. Heavy on "action-adventure or else", there was an energy in this film that had never been seen in a STAR TREK movie, one that was so desperately needed. Above all else, this movie moved ... it was a motion picture. Yeah, Abrams put a little STAR WARS in our STAR TREK, but there was nothing wrong with that. TREK needed something that would give it a jump start back into warp speed.
STAR TREK: THE MOTION PICTURE
Yes, I am a man of great contradiction. This film was an ambitious piece of science-fiction cinema, or as close as STAR TREK has ever come to it. It tried to elevate the bar, but fell far short of its lofty goals. That being said, it is possibly the last of the measured, more thoughtful 70s era science-fiction movies, which saw a great paradigm shift several years before with the release of a little film called STAR WARS.
STAR TREK II: THE WRATH OF KHAN
Horatio Hornblower in space ... 'nuff said. As a huge Age of Sail nut, I loved that this movie was very much a true Hornblower adventure dressed up in STAR TREK.
STAR TREK V: THE FINAL FRONTIER
OK ... ok. It's the worse of the worse, but I still like it. Shatner was a far better director than Nimoy in terms of camerawork, framing interesting and far more dynamic shots. Also this film had some of the better character bits between the Big Three in all the TOS movies. I only wish they were in a wholly better movie. That being said, there's some interesting ideas in this movie, but they were very half-baked and really needed a more skilled screenwriter (yeah, Loughry, you weren't it) to fully work them out.
Honorable mentions: THE VOYAGE HOME and THE UNDISCOVERED COUNTRY.
And the Next Gen movies were really nothing more than two-hour cliffhangers.