I watched Eternal Sunshine of the Spotless Mind (2004) the other day on a heavy psilacetin/3-ho-pce trip. I've seen it before but this time I became more solidly invested in it, noticing things I didn't notice the first time. It's an absolute gem of a film. I'd watched Being John Malkovich twice recently, and I think ESotSM was a lot better; not funnier, but deeper.
I really love these two Charlie Kaufman films though guys. I'd give them both a 10/10 rating and say everyone should see both before they die.
Synecdoche, New York is his best film in my opinion, its worth checking out. It is also his weirdest film perhaps (and his other films are already pretty weird).