Nemesis had a decent enough story (hell, it was practically a Khan re-make anyway) it was just let down by the execution.
I can't remember who directed it now but he made a real hash of it - jokes fell flat and scenes seemed truncated etc.
Not sure I saw the iffy effects mentioned by Zoe, from memory I thought they were pretty good
Anyway, my personal list would is as follows:
1. Star Trek: The Motion PictureVery under-rated in my book. A good, intelligent story, excellent effects (for its day) and a fantastic score. Whilst it did have a humour by-pass I don’t equate serious with bad.
2. Star Trek VI: The Undiscovered CountryAn excellent sign off for the original crew. A good, taut, political thriller with an outrageously over the top performance from Christopher Plumer’s Shakespeare quoting Klingon commander! “Let slip the dogs of war!”
3. Star Trek II: The Wrath of KhanKhaaaaaaaaaaaan! Shock horror! Bill Shatner actually can act!
4. Star Trek: First ContactEasily the best of the Next Generation films, some good performances all round and an excellent turn by Stewart as the increasingly ruthless Picard.
5. Star Trek: NemesisA generally good story (Yay! Romulans!) but a bit too fan-boyish for a main stream audience and let down by bad direction.
6. Star Trek IV: The Voyage HomeHug a whale today! An entertaining romp but a bit to tongue in cheek in places. Chekhov’s Nuclear Wessels line still raises a smile though!
7. Star Trek III: The Search for SpockA generally poor film but saved by the “Stealing the Enterprise” sequence, still one of my favourite moments in any Star Trek anywhere.
8. Star Trek: GenerationsA mediocre film saved only by some excellent acting from Patrick Stewart.
9. Star Trek: InsurrectionA mediocre film that even Patrick Stewart couldn’t save. Would have made a good two-part TV episode but as a film it fell well short –Riker piloting the Enterprise with a Quickshot II joystick – Ugh!!
10. Star Trek V: The Final FrontierCarry on Star Trek – utterly unforgivable. I feel a bit sorry for Shatner on this one as he has taken a lot of flack for how poor this film is (being co-writer, director and star) but I would lay the blame at Paramount’s door for trying to make the film on the cheap. Take a look at the special effects if you need proof, they are easily the worst effects shots in any Trek film.
EDIT:
So with the exception of the Motion Picture, yeah, I pretty much agree with Mr. Bisley!