I thought I was leaving, but I just can’t seem to stay away.
I already answered your question about other faiths.
I did not take my parents’ religion, and it has caused us a lot of tension.
How did I come to Catholicism? Ay… how can I offer a reasonable length explanation?
Well, I was an atheist for about 12 years, mainly on the grounds that there was not enough evidence for religion. During those years, I studied different religions. I took a college course in world religions. I know one course doesn’t make me an expert, but it gave me some grounding. I talked to lots of believers in lots of different religions, and I had concluded that Christianity was the coherent one. But, I couldn’t get over the “lack of evidence” problem.
I was mostly studying science at that time. I was pursuing a degree in science education, so I took a wide variety of courses - physics, chemistry, biology, meteorology.
Anyway, one day I got a miracle. I’m not going to go into the details of it, but suffice it to say that there is no
reasonable natural explanation. It would be analagous to a “thermodynamic miracle”, where a closed system’s entropy spontaneously reduces. The 2nd law of thermodynamics says that this is so improbable that it can be considered virtually impossible.
So I pondered the miracle for a long time, and I consulted experts in the field, and confirmed that science can’t explain it. I was left in a position kind of like what you described earlier. An inexplicable phenomenon, but I still didn’t make the jump to faith.
A couple years later, the memory of that “phenomenon” saved the lives of my wife and daughter. That’s a long, personal story that I don’t think I’m going to go into.

Faith flipped on like a switch.
You may say that I simply convinced myself to believe, or that I was the victim of a hallucination. Fine. The point is, though, that I now had as much evidence for God as I had for other things that I had always accepted, such as the underlying precepts of science, or the evidence of my senses. So I could not in good conscience claim insufficient evidence.
So now I had to figure out where to go. As I said above, I had already established Christianity as the only plausible existing world religion. I will willingly concede that I had an
a priori bias in favor of surviving religions, so I didn’t consider Zeusism very seriously.
Now, at the time, I was adamantly opposed to Catholicism. Adamantly. I thought it was absolutely ludicrous. I used to make very clever little jokes about how all religions are silly, but only Catholicism can be objectively disproved (based on an incorrect understanding of doctrines like transubstantiation and papal infallability). So I had no bias in favor of Catholicism, but as I began to study Christianity seriously, and came to understand the true teachings of the church, nothing else made sense.
Since then, I’ve had another miracle and an answered prayer that defy
reasonable natural explanations, so I’m confident I’m on the right track.
So much for keeping this to a reasonable length.

Let me just re-iterate that I was not AT ALL interested in becoming religious in general, or Catholic in particular. I have been dragged here, quite unwillingly, every step of the way, by my miserable willingness to be convinced
by the evidence.
God bless.