This is beautiful. Love the rhythm at the beginning with him shoveling, the details you put in there. The way you interpersed the summer memories that comforted him (I just about started to cry during the first Mary memory).

I started to suspect about Sara, but wasn't sure, and the reveal worked so nicely. Sad and tender and wistful.

I'd say you've captured John Winchester, the person, in many of his roles -- hunter, husband, lover, windower, father, friend.