Why is Jensen Ackles impossible to draw?

Jensen Ackles is my artistic nemesis. I can do a completely wonky drawing of Jared Padalecki and even with obvious errors it's still recognizably Jared Padalecki. Short of literally tracing, I can never get Jensen Ackles to look like Jensen Ackles.

I don't dislike this drawing/painting as a "here's a generic man" image, but I don't feel like I'm capturing a likeness at all.

At any rate, I'm beyond the halfway point of my goal of drawing faces every day in September and I've got a good shot of finishing up this sketchbook by the end of September. (I'll need to do two drawings on a few days to meet that second goal, but that shouldn't be a problem.)