For me, it's Alien Encounter. Most people are familiar with the 1995 version with Tim Curry as the robot in the pre-show, but my favorite version is the 1994 version, with Phil Hartman as the robot. He's just so annoying I love it. But the 1994 version of the main show takes too long and has too many moments in pitch darkness. The 1995 version of the main show is better. But bring back TOM 2000, Disney! I have an entire MCU level of lore created around him.
Other favorites are Body Wars (when I was younger I had a fem crush on Elisabeth Shue), Snow White's Adventures (the opening day version that closed in 1994 with the witch trying to kill you), Star Tours (the ORIGINAL with Captain Rex), and although I don't like it anymore now compared to its predecessor (and eventual replacement), Honey I Shrunk the Audience (I somehow loved this as a kid. IDK why. If it helps, I also wanted to go on Stitch's Great Escape.)