Personal Life
Tesla led a very secluded life, keeping to himself, and seldom attending social gatherings. When he did go to parties, it was usually because of an obligation to go, although from time to time, Tesla would attend dinner parties held by his friend, George Sylvester Viereck and his wife. He was good friends with the writer Mark Twain as well. Tesla also didn't sleep much. His body had become accustomed to two hours of sleep, to fit in his working habits, and he often went more than one day with no sleep at all; once even working for eighty-four hours straight. Throughout his life, he never married or got involved in a relationship as he thought it would affect his work. Near the end of his life though, he did comment that he believed this may have been too much of a sacrifice.
Picture thanks to: http://en.wikipedia.org/wiki/Nikola_Tesla