For me, as for many people in the West, Catholicism is what fit best with my cultural background. My grandmother came from Mexico and my grandfather from Ireland, and they at least tried to raise my dad and his brother Catholic. On my mother’s side they were all Protestants (Germans and Danish-by-way-of-Greenland), so once I had soured on that it really did seem like coming to Rome was coming home.
But just as you don’t have to live in your hometown all your life just because it’s what you know, you don’t have to be Catholic (or Protestant) just because your parents or their parents were. As more Western people are exposed to Orthodoxy and read the Orthodox histories of what today are considered “Protestant” or “Catholic” countries, the notion of becoming Orthodox becomes less foreign, even if the actual practice takes some getting used to. For myself, I was and am attracted to the Oriental Orthodox communion because of its deep and abiding faith, it’s unique theological expressions, and a certain openness that I see in it that is of a qualitatively different character than other churches (not the big tent of the Romans, nor the hidden pearl of the Easterners).