I think “tight” is the perfect way to describe the first movie. It really has no superfluous scene (IMHO, obviously), everything serves its piratey entertainment purpose - of course, it’s not Fellini or Bergman, but not every movie has to be. It’s just good fun. There is swashbuckling, and sparkly dialogue, and Johnny Depp, and sailing, and cannons firing, and a surprisingly good plot (after all, it was derived from a Disney ride, who’d have thunk).
As others have described above, the other two movies lose that tightness completely and come across as purely a money-making franchise. Which they were, so there’s that. I disliked the second one the most, as it took all the elements that made the first part fun, and re-used them again and again and AGAIN until they ceased to be (again, IMHO). In addition, it introduced the convoluted plot that also cripples the third movie.
The third movie is a bit more original, and uses “callbacks” more sparingly. I thought it had some great scenes, but they all were rather disjointed, as the plot does nothing to keep things together. Due to the “plot” exposition, though, it’s about 3 hours too long (at least it felt that way). But, if you’ve watched the second movie, there’s really no reason not to watch the third, as it (well, mostly) resolves the plot set up in the second.
[strange pet theory hijack]
Funnily enough, I think if you look at the respective scores, they perfectly illustrate the development of the movies:
The score of the first is really excellent, setting the mood and punctuating the action. (BTW if you pay attention, you’ll notice this score popping up in odd places - in sports reports, in news segments, etc.) It’s rollicking good fun, and written by Klaus Badelt.
The second movie had him replaced by Hans Zimmer, who Badelt is affiliated with, but who is the “bigger name” in Hollywood music. I usually love Hans Zimmer (sue me), but this I feel was not his best effort. He took the first score, and blew it up, re-using themes in places where they did not really make sense, basically just overloading everything. Bigger, but not better.
Now the third movie was again scored by Hans Zimmer, but occasionally used complete parts from part one (I think seemingly unchanged - I’ve not listened to that score separately, but I’ve been running to the first score on my ipod for about a year now, and I think I have it down pat). But, in addition, there were more new ideas integrated into the score that fit the different settings and were not just derivatives of the first.
[/spth]