I recently watched The Number 23 (gorgeously shot, especially the imagination scenes) and Eternal Sunshine of the Spotless Mind (very original and disturbing) which led me to appreciate Jim Carrey's talent as an actor who plays the lead in both (It was a second viewing for the latter).

The Number 23 has better (excellent) direction but suffers later on as the movie progresses from later drag as well as a lesser-than-superb twist. It's also reminiscent of a superior Pi whose main theme is also around a number.

Eternal Sunshine of the Spotless Mind is the lesser of the two though far more original. The movie's most notable moment the admin girl's (Kirsten Dunst who at her finest) discovery (SPOILER ALERT) of previous erasure for the same 'problem' she's currently having. Of lesser impact is also the moment when that same girl states a quote in which the movie's title is part.