indelibleface
Bluelight Crew

Yeah, I know, no one likes this one. Star Trek: The Motionless Picture.
a.k.a. Star Trek: The Motion Sickness
That said...
I saw this film when I was little, and it basically inducted me into the wild, nerdy world of Trek. I was obsessed with the franchise because of this film by Robert Wise. So, maybe I'm biased a bit. But, honestly, I think this film deserved a lot more than it got. Apparently, Paramount thought so too, so they let Wise create a director's cut of sorts.
The cut adds back several character building scenes that were removed because of time constraints. They also finished many of the special effects that they couldn't complete originally, integrating them seemlessly using effects that would have been possible back in the seventies (take that George Lucas). If you remember, there were many scenes, the recreation room scene in particular, that have big blue panels on the walls instead of windows -- these are actually blue screens that were meant to have star effects on them! They added those back in, and they also created all new effects showing V'ger's spaceship in full, actually [finally] giving you a better idea of what the damn thing looks like. Among other minor tinkerings with the movie, it really made a better film, turning one of the arguably more average entries in the series to one of the best.
Anyway, I'm not sure why I liked this movie more than everyone else. Maybe it's the ethereal nature to some of the space scenes -- you can tell 2001: A Space Odyssey was an inspiration. I also liked the premise -- the idea of a great big confused child-like machine creature searching for meaning to his life and searching for his "creator", assimilating and collecting information across the universe. The concepts dealt with in the film were very deep, especially compared to some of the latter day films.
But I tended to like the ones everyone disliked in the series (I loved the critically slammed Generations, I feel like that was the best of the TNG movies), although I completely hated The Final Frontier like everyone else. The Wrath Of Khan is beyond a shadow of a doubt my favorite film in the series, but The Motion Picture definitely deserves more. It's quite the art piece, definitely visually if not conceptually. If you are a trekkie and disliked the film, give the director's cut a chance.