What do you love, of what you love?

I guess first, the question would be, how do you know you love it? What does that feel like, what does that mean, for you?
And then… what part(s) of it? Is it the greater concept? the higher morality/purpose/virtue? the product or result? the medium itself? the disposition it demands? an instinct? a vigor?
Do you reach for it? Is it tangible? Do you know? How do you know?
And then, why: elaborate as much as you would like, hopefully as much as you can. (Applies to any or all of the abundantly question-marked above.) In this gnarled search of passion, fulfillment, what has absorbed you, courted you, claimed you? In what ways do you struggle with it? What is the relationship(s) of this(ese) love(s)?