I do photography, archery and 3d printing.
Photography seems to only invite critique, archery tends to be a short subkect of conversation but 3d printing usually leads to the most questions and takes up a larger part of the conversation.
When i played bass, no one really showed any interest other than one friends who caught me playing a small part of something i was figuring out how to follow it up and wanted to sample it. Which eventually led to nothing.
I designed a silencer for airsoft in fusion360 and already sold 10, a friend asked me to print a spitfire and i eventually summoned up the idea to make some spitfire exhausts he could mount on his spitfire themed mini cooper, my archery club has these plastic stars that tend to be used on the carnival for air guns so i designed some custom ones with their logo "just because". I also printed some trophy's which i still have to give out.
Once you get a reliable 3d printer and learn the software well enough, it is an amazing hobby.
The wife paints miniatures (think warhammer for example) and she needs plinths for her competition models. So i shit out a custom plinth within an hour including print time. It's so awesome and after 5 years i'm still amazed when i get to hold something that was nothing more than a digital design a mere hour before, i have a mini factory inside my house that only produces what i tell it to...it's absolutely insane.