Honestly I think your haiku is pretty perfect to match the painting, he does look like he's pondering his life and what he could have done differently, I always like a challenge though so how about -
Lost inside my head
Wonder what I could have said
What life have I lead
Honestly I think your haiku is pretty perfect to match the painting, he does look like he's pondering his life and what he could have done differently, I always like a challenge though so how about -
Lost inside my head
Wonder what I could have said
What life have I lead