Eternal Sunshine of the Spotless Mind
Also in my top 5 favourite films of all time.
Being John Malkovich, Adaptation and Synecdoche, New York are a tie.
All 3 are an anthology trilogy to me, which makes sense since the theme of BJM is Acting, A is Writing and S,NY is Directing.

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Adaptation, shortly followed by Being John Malkovich!
Who Killed Laura Palmer?

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I haven't seen Eternal Sunshine in ages but from what I remember I would rank it second behind Synecdoche, New York. Adaptation finishes off top 3 with Being John Malkovich being fourth. I haven't seen the others yet but I doubt anything we'll be able to beat Synecdoche NY. It's probably one of my favorite movies of all time!

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From what I have seen so far (Adaptation, Eternal Sunshine, Synecdoche, and Being John Malkovich), I would have to say that Synecdoche, New York is my favorite.
Everybody has a heart except some people.

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I actually haven't seen Synedoche, NY which I'm a bit ashamed of, but here my favourite of his films I have seen is Eternal Sunshine of the Spotless Mind. I basically love everything about it. The actors, characters, script (obviously), the directing, the visual style, the 'mood'. It's the perfect film for me.
I do like Adaptation. and Being John Malkovich, there's just some elements in them that aren't right for me that makes them not on par with Eternal. To be honest, I find Being John Malcovich quite disturbing.
Do not speak of this, if you do
They will find you.

Adaptation

Adaptation
Even the most primitive society has an innate respect for the insane.

Synecdoche, NY - Currently my favorite movie of all time. Adaptation is my second favorite from Mr. Kaufman but, though good, it is not in my top of all time.
Interestingly, my first date with my ex-girlfriend, we watched Adaptation at my apartment, through our slow separation & explosive breakup a year later, I watched Synecdoche: and that might have something to do with it, I think of her as my Hazel.
I'm not very impressed with Eternal or Being., though I haven't watched them in some while. Maybe my brain is addled, but no movie speaks to me as directly, like I've been up for ten days on meth, as Synecdoche NY does. And I mean that in a scarily literal sense. Watching it is like thinking God is playing a cruel practical joke on me, referencing my own life in every scene, to very specific and particular things that are not broad enough to be simple analogies that just 'anyone' could get.
If that is part of the genius behind the movie that speaks as archetypes to everyone in that way, then Charlie Kaufman really is divinely inspired. And thus, as a paradox of some sort, God really is talking to me directly through Kaufman by the fact that Kaufman managed to create this movie without God talking to me directly. The omnipotence paradox of Kaufman's Synecdoche, it's Heraclitus, it's Mandelbrot's set it's Karamazov, it's Krapp's last tape. Even parts in the script that weren't included have personal meaning, and meaningful too in that they weren't included. A confirmation bias of my own maybe? Anything that makes someone as intellectually stubborn as me yield so much for that, then, is impressive. Maybe I'm just getting old and yielding more or easier. A line from Henry Bean's "The Believer" sums that up for me; but "what if" yielding, "being crushed", is the best feeling you could have?

well let me first say, all the films hes written, are in my Top 50, i love everyone of them, but right now, i think its.
Synecdoche, New York!!!
One of the few films i can truly say that feels like it has a life inside it.

Synecdoche, New York

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I've probably seen Eternal Sunshine the most times, but no movie has affected me more than the one time I watched Synecdoche NY. The only movie as complete as that movie is Raging Bull.

Being John Malcovitch
www.somewhereinblog.net/blog/tuklifiedblog

Either Eternal or Being John but they're all fantastic.

Synecdoche, NY. He didn't leave anything unsaid.

Human Nature is my favorite so far!!! I'm totally in love with his writing!

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It's hard for me to rank his top 4, because I love them all equally and for different reasons. Of course my top 4 are:
Synecdoche, New York
Eternal Sunshine of the Spotless Mind
Adaptation
Being John Malkovich
Confessions of a Dangerous Mind was a brilliant script. It's a shame George Clooney didn't want Kaufman too involved with the project, it could have been much better. It seems like a lot of the themes that Clooney didn't fully (not saying he's dumb, but they just seem unintentional) understand made their way to the film anyway. And Human Nature was supposed to be directed by Kaufman, but he gave it to Michel Gondry because Michel wouldn't leave him alone about making Eternal Sunshine of the Spotless mind, however Kaufman was wrapped up in Adaptation at the time. So to me, Human Nature almost feels half-assed, but it still has the themes that match Kaufman's other films. So even though I don't mark them as masterpieces like his other films, these two are still great.
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Haha wow! I'd put it in the same order. Your screen name makes it even more crazy, since Magnolia is one of my favorite movies of all time.