Do You Enjoy Your Work? Why? What Exactly Makes It All Worth it?

I work long hours and often wonder why the hell I am doing this, and then I realize that I truly enjoy the challenge. Every day when I come into the studio to work, I have the challenge of creating new ideas straight out of my own head. I have no one else to do this for me. When I die, my ideas die with me, so I feel the pressure to get them all out of my head as quickly as possible. This creates a sort of tension that helps me work harder. And after I have a productive day or week, I can stand back and feel a little fulfilled that the things in my head have been brought to fruition, making new space for gestating new ideas.