I also think A Serious Man is ridiculously underrated. The more I think about it, the more it strikes me as my favorite Coen movie ever. I'm not sure, however, how non-Jews would be able to fully appreciate many parts of it, from the Hebrew lessons, to the dentist story to that epic Bar Mizvah scene (which you can only fully relate to if you had gone through the same procedure!). No offense, just a genuine wonderment. Anyway, as has been mentioned, the perfect balance between comedy and drama. In fact, that scene where his brother breaks down in tears at the swimming pool, crying about not letting him play poker (was that it?) really got to me. It was just shockingly real and honest.
"Those are my principles, if you don't like them... well, I have others.”