Mrs. Doubtfire said:
1 At World's End
2 Curse of the Black Pearl
3 Dead Man's Chest
4 On Stranger Tides
I chose At World's End as my favourite, cause it's just so epic, the way they go halfway around the world and back again. I liked the inclusion of the Nine Pieces of Eight, the pirate lords, the final battle, etc. Really gives the film series that little MMPH.
Curse of the Black Pearl is where it all began, it introduced some of the best characters the film industry has ever seen, has a fantastic storyline, and brings back the nautical genre of pirates like no other film.
Dead Man's Chest also introduces some of the best characters, such as Beckett, Davy Jones, Tia Dalma, and it explains what happened between the two films well, as well as a brilliant fight scene on a wheel accompanied by a fantastic soundtrack, much like its prior film and successors. However, it seemed to lack a bit of a story, though thankfully this was picked up on in the next film.
On Stranger Tides is perhaps the least structurally solid movie, lacking a very convincing plot, which seemed rather solvable right from the beginning. Don't get me wrong, I still loved this movie, purely for the inclusion of the three main supports, Sparrow, Gibbs and Barbossa. However, some of the characters felt rather shoehorned in, such as Swift, Serena and to a certain extent Angelica. Still, some of the plot points were fun, though the film seemed to be a wee bit slower than the previous three films, despite all the running Jack had to do.