Like you, I was raised Christian (my father was a minister until I was about twelve, and since Mum worked night-shift on Saturday nights, I wound up going to church every Sunday because there wasn't anyone to look after me at home).
I've always said the thing which turned me away from Christianity wasn't so much the Christ, but the Christians. Someone once said that Christianity wasn't an ideal which had been tried and found wanting, but rather an ideal which had been judged too difficult and never actually tried. Which isn't surprising, in a way, since even a quick look through the gospels will make it clear Christ was preaching living Judaism in Nightmare Mode.
Problem is the people who tend to believe that because they're "Christian", they're automatically more moral or more ethical than anyone else, regardless of their actions - treating the religion like a form of moral and ethical whitewash. (If you want a collection of examples, I suggest looking on the Government benches in the Australian Federal Parliament).