In an ideal world I would go back to chemistry.
Since the option in the world we have is working 60 hours sub minimum wage trying to get through a PhD followed by bouncing round on 2 year short term contracts as a postdoc (still barely on minimum wage) while University administrators make your life hell I took the only rational route.
I switched to software and make people's lives and the climate worse for a paycheck that still isn't enough to live where I want to live.
But ideally I'd use my brain to research some of the fundamental challenges we face, battery chemistry, plastic recycling, industrial catalysts, etc, etc.