Reclaiming my hours

Yesterday I uninstalled 'enter the gungeon'. My computer tells me that I have spent 90 hours playing the game since I downloaded it in February. Ninety hours that theoretically could have been spent reading books, working out and improving my writing.

Now I want to reclaim my hours, to figure out exactly what I have missed by playing a game. How valuable are 90 hours spent on something? What skills could I have picked up instead?

This post will be used to track how I reclaim my hours.