Portrait: Grandfather (re-submitting)

Re-submitting stuff from my other gallery Sorry to the people who see this again.
A portrait of my Grandfather, that I did as a gift for my Grandmother and Dad. This was really hard for me to do, for a lot of reasons- I only had one old black and white picture for reference, and I only got it a few days ago (I had to have it finished by today.) My biggest problem was the fact that while I was painting my power went out, not once, but twice. And then, if that wasn't enough, my photoshop decided to make me cry and just closed -for no reason I can find. All in all, I had to redo this four times T-T I ended up just starting from scratch around ten pm last night, and working straight through the night until around six in the morning to get it finished. It's still got a lot of stuff to fix too T-T Tool used: Photoshop pro cs, wacom 9x12 tablet. Time taken: Only god knows... 12+ hours?