Originally Answered: Did thomas jefferson live up to beliefs about Life, Liberty, and the Pursuit of Happiness in his personal Life?
Thomas Jefferson was cool because he was very much a "practice what you preach" kinda guy. He actually wrote an essay about what he did in order to live twice as long as most men his age (The Healthful Habits of Thomas Jefferson)
While Jefferson was a man who was devoted to liberty above all else, and is remembered as the most liberty-endorsing founding father, he was also a product of the era in which he existed. While he himself was free, he did own slaves but over the course of his life, fell in love with a slave named Sally Hemings and bore several children with her. While this is an unforgivable hypocritical act, most men of his time would have taken pleasure from a woman he owned with relish, and nary a thought about it. However, Jefferson did change his mind over time, and spent the last leg of his life setting up paperwork and endowments in order to free his slaves and give them enough money to survive as freed people.
As far as the pursuit of happiness goes, the saying which you are quoting actually comes from a Scottish political theorist named John Locke who was popular at the time. The ideals of Lockian Liberalism, the idea of "liberty" that one must have property in order to be free was expressed in his statement that "no one ought to harm another in his life, health, liberty, or possessions."
Jefferson, who had a flare for the poetic and philosophy, felt that this direct reference to property, given the aforementioned liberty was not only redundant but a little crude and narrow, so he changed it to "the pursuit of happiness."
Given that Jefferson coined the phrase in the first place, traveled, and loved his wine and women, I'd say that he was pretty much into the pursuit of happiness as well.