I was mainly referring to the differences in philosophy between Catholicism and Protestantism - for instance, the idea of a personal relationship with God rather than needing the intermediary of a priest. I was raised Protestant, and while I have no problem with Catholicism (well.... at least no problems that I don't ALSO have with Protestantism!), I never understood the point of confessing to a priest. Does he have the power to absolve you? No, certainly not. I get that the idea of telling your misdeeds to a living, breathing person may be a better deterrent than confessing them only to a God you can't see, but I don't really like the idea of guilt and shame being used in this way. Of course, Protestants use guilt and shame too, just in different ways. But I still think a personal relationship with God is more meaningful. I also was always a bit offended when I went to church with my BFF (who was raised Catholic) and since I myself was not a Catholic, I was not allowed to take communion, even though I took communion at my own church. If my Catholic friend had come to church with me, she'd have been allowed to take communion with us.
I hope I haven't offended you, either. It is certainly not my intention.