For me it's Chrono Trigger. I always want to play it. I want to show it to my children. I hope it will be regarded as a masterpiece for generations to come.
I partially agree, but they've degraded to me personally over time. This isnt because they're bad, but because I've played Prey (2017), System Shock (the remake is great) and other Immersive sim/shock games and see what it could have been. The issue is making it simple and streamlined allowed it to sell like crazy. System Shock and Deus Ex will likely outlive Bioshock, despite being older. Bioshock will still be remembered for the story it told, but the actual gameplay will be forgotten.