I rewatched the entire trilogy a few weeks ago and I know objectively Raiders is the best, but Doom will always remain my personal favourite. I watched it a billion times as a kid and revisiting it for the first time in what feels like ten years, it felt good. Unlike Crusade, not one scene is wasted or worth skipping. (as I rewatched Crusade I couldnt believe how many boring moments there were, whereas exposition in Doom involved monkey brains and snake surprise, in Crusade there's just a crusty dude lecturing Indy in his office. And thats it.)
Temple of Doom has a lot of iconic Indy moments, I have this probably incorrect notion that Doom...not so much solidified, but opened up Indy to world pop culture in a way Raiders didnt, this movie seems to have Indy in way more scenarios or moods than any of the others. I think in Turkey and Cyprus, Doom is the Indy movie aired the most on TV, and even in the UK I seem to remember seeing Doom aired more than the others.
Temple of Doom also has the best usage of the whip (for when you want a woman to shut the hell up and kiss you), best booby-trap ("We.Are.Going.To.Die!") and best awkward getaway technique for a bad guy (Molo Ram has to literally lie down on the floor and let a trapdoor whisk him away to safety). I almost prefer the music in Doom to the others too, it feels more bombastic. That shot of Indy on the bridge is what comes to my mind when someone says "Indiana Jones".
I absolutely love every frame of this crazy film, and Indy, Willie and Short Round remain for me the most strangest and quirky threesome of cinema. The campside poker game between Indy and Short Round brought back so many memories of my childhood and just fills me with glee, especially when Indy discovers cards in the kid's sleeves and the kid just breaks out a grin.
As for Crusade, I dont have hate for it like others do, how can you hate an Indy movie!? I love Indy's origin too, very cool. As I said above though, there's less creativity on display in the storytelling, that damn scene where Indy learns about the tablet and his father is so boring.