A neighbor and I were chatting at New Years. He mentioned he was Catholic, but doesn't believe in Heaven, Hell, God, or going to church. When I asked why he'd call himself Catholic then, he just stared at me confused. It seems to be more of a way of explaining where you've come from now, than of explaining where you're at in life.
thats what sanctus always says..that you cant call yourself a catholic if you dont believe in the faith and dont go to mass. that makes sense to me too.