My ancestors and most of my family are Protestants. Reading the true history of the church is what led me to being Catholic. There are a lot of gross exaggerations out there, and a lot of out-and-out lies spread about the Catholic church. For example - the Inquisition. Any honest historian will tell you it was a lot different than most people (especially teachers) say.
I did some investigation and wondered why these people (Jack Chick, etc) would spread lies about the church. That led me to investigate the Catholic Church more and now I am at mass about everyday.
The DaVinci Code is just the latest example. People say "ahh, it's just fiction", but how many believe it is the truth? A lot of these stories probably started the same way.
Did you marry a Catholic?