I Stand Alone
Well, it doesn't have the dizziness of Enter the Void, the sickening violence of Irreversible, or the hardcore sex scenes of Love (which I've yet to finish). Or maybe a better way to put that is that it has those things to a far lesser extent than Noe's other movies. I think it's my favourite film that I've seen from him so far, mostly because of the introspective element, how it dives deep into the main character's mind. Irreversible pretty much traumatized me the first time I watched it and I was worried that this would do the same, but after the shock of the wife incident wore off the rest didn't seem as bad.
Gaspar Noe sure does prompt a lot of thinking with his movies. That alone makes me think that he's a great artist, because even though the act of watching his movies are experiences I don't want to repeat, the amount that they leave me reflecting on the movies and the themes counts for a lot. This is probably his best film.