Hello,
I'm the type of person who can get lost in something easily, weather its reading, listening to music or drawing. It would take me hours till I realize how late it was getting and even then it would feel like minutes have past not hours.
It feels great to finish a drawing even if it took a couple minutes or a couple of hours, I love the feeling of finishing something and then pattying myself on the back for doing my best.
It also makes me smile to see my hands and face, covered in led in the end.