My ancestors have usually been pretty predictable, a long history of Catholics from St. Mary's County, Maryland, and Kentucky. Suddenly out of the blue I make a discovery concerning my 3rd great grandmother. The ancestors from her side of the family are solid Protestants from the historically different states of Rhode Island, New Jersey, Virginia. This includes the historic Borden family (yes, that includes the infamous Lizzie Borden) whose ancestors were Quakers from Rhode Island. I had learned about this connection many years ago from online trees but dismissed it as it just didn't fit into my family's history, and more importantly, I didn't see solid proof. We all know how inaccurate online trees can be.
I have now discovered documented evidence, and more importantly, DNA connections to this new discovery. Of course, I welcome this new branch of my family tree with open arms. I get excited when I can discover ancestors who bring a rich history into my genealogy. It would be boring if everyone was the same or from the same states.
I guess the lesson from all of this is never dismiss the improbable when it comes to your family tree, it just might be the truth.