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One of the hardest things about identifying what you love is acknowledging that it is rarely black and white. Yet people + media romanticize a notion of "perfect" love that has no lows or flaws, and the average person buys into this. As a result, we often feel as though we still haven't found what we love because it's not an unequivocal love.
With hacking, there will always be frustrating bugs and grunt work.
With romantic love, there will always be ugly fights and unappealing compromises.
And so on.
It would be disingenuous for people to say that they love commenting their code or that they enjoy every bit of arguing with their significant other. But having the wisdom to know yourself and accurately "measure" the extent to which you love something relative to other experiences in life is tremendously powerful.