1, 2, 3, 4.
1. I loved the first one since it was like the old serials, almost like Star Wars brought back the old sci-fi serial type movies and made sci-fi fun again (and movies in general).
2. was dark and was the movie which ushered in the PG-13 rating.
3. I compare to the Star Wars triology once again: In Return they brought back all the elements which made the original Star Wars great: like the Death Star and Jaba's lair, which imo was an extended cantina sequence. Last brought back the Nazi element from the first one and some of the original characters. Another parallel from the Star Wars films was the introduction of a character's father.
4. the forth Indiana Jones was OK, up until they had the ridiculous chase scene which ruined the whole movie for me.