Selfishly?
Golden Sun 2:
One of my favorite game series's growing up, and the first time I experienced a "good" plot twist.
Knights of the Old Republic:
Talk about good plot twists, I rented this game from blockbuster once and spent years thinking it was a fever dream.
Pokemon Emerald:
Pokemon Crystal is the first game that let me play as a girl, but ruby/sapphire is really my generation.
Baldur's Gate 3:
Met my gf playing this, 1000 hours in, all coop with her.
Monster Hunter World:
Met my best friend here, 2000 hours in, and basically infinitely replayable in a way that Elden Ring isn't