I grew up loving Temple of Doom the most, but on any given day the first 3 all are films I truly love, grew up on and have burned out VHS tapes over the years, thankfully the DVDs are holding up well.
Obviously Crystal Skull came out and it was my most hyped film of all time. And it came out on my 21st birthday. Does it have some flaws sure, but I too completely do not get when people compare it to the Prequels. Ford at the very least still was great in the role, and the action was top notch (Indy's shadow over the mushroom cloud and the spaceship are iconic as the rest of the series) I wish it took a few more chances (But Spielberg already did enough by homaging the 50s cinema which definitely split some people, but I loved it)
I really consider it 2 minutes of eye rolling, the rest is the great entertainment that fit in perfectly with the series. For my ranks.
Raiders (My favorite film of all time) 10/10
Temple of Doom- 10/10 (I also consider this one of the boldest sequel attempts ever, a complete 180 from Raiders but works perfectly)
Last Crusade- 10/10
Crystal Skull- 9/10