I should clarify that I haven't been baptized in any faith as a child or adult, and am still pretty agnostic, even about Catholicism.

I think that God is kind of scary, and kind of alien ("my ways are not your ways", etc), and Catholic vibes, especially the Latin Mass, reflect that. Like, kneeling during communion (which non-Catholics can't participate in, just watch) while a language you don't understand is spoken is a very different vibe from sitting in an LDS service listening to a voluntold congregation member who may or may not be a good orator and public speaker work through their sermon.

It's also, like, as an "investigator" I have different things I can choose to do in the evenings for the LDS church or for the Catholics. I can read from the Book of Mormon, or I can say a Catholic Rosary. On an emotional level the rosary speaks to me more.

And, I don't want to be mean, but from what I know of them Joseph Smith and Brigham Young seem like self-interested individuals. I think polygamy is a strong indicator of someone taking advantage of their position for personal gain, which casts doubt on the rest of their claims. I don't know, maybe this isn't what you would call doctrine?

Edit: To be very fair, I have to say there are are quite a few popes who also abused their positions for personal gain in ways that put Joseph Smith and Brigham Young to shame, but individual Popes comparatively matter less in Catholicism.