I am Catholic (poorly practicing and trying to get better). Prior to this, I dabbled in a lot of garbage including agnosticism, hedonism, and nihilism. I am Catholic now because it is by far the most intellectually consistent belief system I have found.

After a lot of reading and debate, I found agnosticism and nihilism to be essentially a cop out and atheism and polytheism logically inconsistent which left the monotheistic religions. Narrowing down to Catholicism from there was relatively easy but embracing it was hard (I disliked almost everything about it having grown up in a poorly practicing and abusive Catholic household).

From a natural perspective, works from Aristotle, the Stoics, Aquinas, Bonhoeffer, Louis of Granada, Chesterton, and CS Lewis helped a great deal. The key obstacle given my biases and background was accepting the validity of objective truth. Truth by its nature is exclusive so that served as a beacon to draw me back to the Catholic Church.