If I had a workshop, it would be a tech heaven. Soldering station, 3D printer and all that stuff so I could do console mods myself and maybe even make something new with a RasPi Pico and stuff! And maybe even get my own PCB printed to turn my old N-Gage QD into a tiny little bluetooth controller xD.
Sadly I am probably too blind to solder (haven't had the opportunity to give it a shot yet though!) and I don't have the space... But maybe, one day, I might. =)
Have fun with your soon-to-be workshop!