Immaculate Conception of Mary (it was Christ), praying to statues and what supposedly happens at an RC communion and the entire papal system and celibacy (sp?). And the ole' Martin Luther (I'm not Lutheran either) bugaboo about being saved by grace not by works...I think you know the drill.
Don't get me wrong I married into a Catholic family, my uncle-in-law is an ordained tenured priest at Seton Hall Univ. After many long long long discussions we have agreed to disagree.