Indiana Jones and the Last Crusade/YMMV

Alas, Poor Villain: Elsa.
Complete Monster: Donovon. Sending mooks into death traps for a prize he himself wants and then shooting Henry Sr. in cold blood.
Crowning Music of Awesome: Arguably the best and most nuanced of the Indy scores.
Moral Event Horizon: Not that Donovon was a saint before it, but shooting Henry Sr. just to force's Indy hand in trying to reach the Grail.
Surprisingly Improved Sequel: Generally seen as a big improvement over its predecessor.
Win Back the Crowd: Temple Of Doom had a decidedly mixed reaction, with Steven Spielberg and George Lucas admitting they let their personal problems interfered with their work. They explicitly sought to go back to the first movie - return to a more light-hearted adventure, as well as bringing back such elements as Marcus, Sallah and the Nazis. By all accounts, the duo succeeded.