Despite the fact that the Reuben is non-kosher, in my experience it is more prominent as a Jewish dish than cholent. Remember, this is only based on my opinion, and I'm not claiming to know what I'm talking about.
As a Jew I have never had a Rueben, but I have Cholent every week. Cholent is definetly a more prominent Jewish food than a Rueben since it is against Jewish law to eat a Rueben.
My guess is that you're Orthodox or at least generally more observant than the average American Jew. For the purpose of this quiz, think Larry David Judaism, not Hasidic Judaism.