I’m an adult convert to Roman Catholicism. Naturally, on my way in, I found myself at the final decision point of weighing between Catholicism/Orthodoxy. As you say, both have the same origin (and I pray that both will be reunited in full communion soon!), and both have valid sacraments. And like you, I am heavily attracted to aesthetic reverential features of many Orthodox liturgies.
One of the keys for me, in ultimately becoming Catholic (not Orthodox) was the gift of the Pope, given by God to His Church. I imagine you’re familiar with many of the Catholic historical and exegetical reasons for having the interpretation of the papal office that we do, so I won’t reiterate those here (though if you feel you haven’t heard enough, from the Catholic perspective, I’d recommend checking out some formal apologetics resources from
Catholic.com). Personally, at a certain point this very simple (and completely non-intellectual) thought just came to me…
the papacy just seems like the kind of gift God would give His Church. This visible source of unity, through whom we maintain communion with Jesus, through maintaining communion with the single person Jesus has authorized to have stewardship over His Church in any given generation. The person to whom Jesus gives the special command to “feed my sheep”.
There are so many sources of chaos and confusion afoot in the world today. The stability God gifts His Church with, through a visible, identifiable,
individual human being (rather than a collection of multiple human beings who may disagree with each other and be unable to tie-break) just seems to me like part of the mechanism through which God would secure His Church on a ‘rock’. It’s my understanding, for example, that the Eastern Orthodox don’t really have authority to call a new ecumenical council. Which one of them would? What if they disagreed amongst themselves? Whereas the Pope is the Pope, no matter whether an individual catholic (or even individual priest, bishop, or cardinal) disagrees with the Pope’s interpretation of something. He’s sort of like an ultimate tie-breaker. In the name of a unified single Church that ultimately speaks with one voice. And that’s just so synchronous with previous revelation of who God is, that especially when looking at how Jesus spoke to Peter, and how history unfolded, I look at it and say… "Yeah, Catholic. The papacy seems consistent with ‘the type of thing God would do,’ the more I get to know Him. Now let’s get along with improving our liturgy to incorporate all these beautiful elements that the Orthodox use.
"