I, personally, started researching the claims of the Catholic Church couple of years ago and feel very confident that we will end up in the Catholic Church. Of course, along the way, there was/still are some degree some teachings that I have a hard time swallowing. But, here is how I see it these issues in order of importance
The Eucharist - This is HUGE for my husband and me. We believe in the real presence of Christ in communion, which means that automatically our choice of places to worship have narrowed considerably (i.e., Catholic, Orthodox, Anglican, Lutheran, etc.)
Authority - Also, very HUGE for my husband and me. This eliminates Anglican, Lutheran, and other Protestant denominations claiming that they believe in the Real Presence.
So, we were left with Catholicism vs Orthodoxy so next, we considered the authoritative structure within the Church and it makes much more sense to us that there is a visible “head” of the church, which seems to be the only big difference between the two.
Now, I am not extremely comfortable with many things that are taught in the church such as praying to saints, rosary, etc., BUT I do not believe that every question I have regarding those teachings must be resolved before we enter the Church because I acknowledge that the Church is infallibly led by the Holy Spirit, will never fall into error on faith and morals, and that I must submit to that authority.
I may NOT understand it (just like the Trinity is hard to explain or even comprehend), but I may not disbelieve it either. I must enter into the Church knowing that I still have a lot to learn and that the Church is correct on these issues, no matter how hard they are to understand.