jah003 said:
Gattaca.
I've seen this movie so many times and I love it. 82% on rotten tomatoes.
An all timer for me and so underrated, hits some still very relevant topics and is shot in a way that makes it feel pretty timeless.
One other I haven't seen mentioned: Brick.
It's Rian Johnson before he got too clever for his own good, a film noir murder mystery set in high school starting a young Joseph Gordon Levitt. It totally shouldn't work but it does and it's great.
Also seconding the Walter Mitty recs, super underrated film and absolutely beautifully shot.