For me I would say that mine would be Till I Collapse by Eminem, had some struggles and battles with my life and health and still keep going and when this song came out I thought yes Not only is the guitar a passion so is Muay Thai, so I play or fight till i collapse
also Red Red wine by ub40 as it was playing during the the time i went from dreaming about naked girls to seeing naked girls etc.
Dont give it a lable - just Feel Free to let your playing Be....