I cannot point to one thing and say, "It is that right there that brings me effortless joy!" any more than I can say, "Oh, the sky starts right over here." It is these series of breaths we take and the beautiful things that happen in between them that provide weight to our existence.
Whatever it is, you have two choices: Live with it and continue to be unhappy or take a good, serious look at yourself in the mirror. The key word here is mirror. We can't see our blemishes until we have a mirror to reflect them back at us.
Each moment, life places us on the crest of a powerful wave -- we can either deny our capacity to choose, or we can wholeheartedly embrace it. Blue pill or red pill, decay or evolution, these opposing forces are at endless play.