What Most Christians Don't Know About...

Martin Luther

1. Martin Luther loved beer and wine. He was quoted to say that "beer and wine are one of the greatest gifts of God to man.". 
2. He and fellow professor and reformist, Melanchton, used to have beer-drinking contests using the Roman Catholic recitation of the Rosary, "Hail Mary" and "The Lord's Prayer", where each line of the recitation was one round of beer. He was known to recount humorously these bouts because Melanchton would last only until "Give us this day our daily bread" where he drops to the floor due to the intoxication (Christianity Today, Biography of Martin Luther).  Despite his more than average consumption of beer, Martin Luther was never known to get drunk.
3. His over-reaction to the Roman Catholic indulgences was to emphasize Salvation by Faith alone or sola fide and sola scriptura. There is no record that he advocated sola gracia. 
4. He believed in consubstantiation, i.e., that the bread is actually the body of Christ and the wine is actually his blood, based on his strict hermeneutics. He was quoted to say, "If Christ said, 'this is my body', who are we to question that!"
5. "He mocked fellow reformers, especially Swiss reformer Ulrich Zwingli, and used vulgar language in doing so." (http://www.christianitytoday.com/history/people/theologians/martin-luther.html)
6. About daily prayer, Martin Luther once declared, "There is so much I have to do during the day that I have to spend the first four hours in the morning in prayer". He woke up daily at about 4 am.

John Calvin (most details from https://www.britannica.com/biography/John-Calvin)

1. He was rarely if ever, a field worker, and was mostly an academician
2. He believed in Christianity being a state religion, therefore forcing Christian values even on an unregenerate community. He did have some level of success in cleaning up Geneva during his time.
3. He was almost solely responsible for the (pre-meditated) murder of Miguel Servetus, a rival theologian, and he did this after he had already formulated and published his Institutes of the Christian Religion and was a church leader in Geneva
4. He had a "reputation as cold, intellectual, and humanly unapproachable. His thought, from this perspective, has been interpreted as abstract and concerned with timeless issues rather than as the response of a sensitive human being to the needs of a particular historical situation. Those who knew him, however, perceived him differently, remarking on his talent for friendship but also on his hot temper.
5. "He insisted on the necessity of a holy life, at least as a sign of genuine election"
6. "Although he insisted on the “total depravity” of human nature after the Fall, he did not mean by this that there is nothing good left in human beings but rather that there is no agency within the personality left untouched by the Fall on which to depend for salvation".  [Quite a far cry from what Calvinists today preach.]
7. "He believed that every Christian—and he certainly included himself—suffers from terrible bouts of doubt." 
8. Even when he was patient, he was too unsympathetic sometimes. He showed little understanding, little kindness, and certainly little humor. (http://www.christianitytoday.com/history/people/theologians/john-calvin.html)

Christians JUST NEED to know some people whom they are following or emulating...