We all have different hobbies. What is one hobby that sets you apart from your friends and also has a constructive usage.
Mine is to learn how to code in various languages by accepting jobs. That makes me work better under pressure of submitting my work fast.
P.S: Making memes doesn't count.
Watchmaking. I love to repair/build/rebuild mechanical wristwatches; learn everything there is about mechanical watches, new materials, technology, etc.
It is a fascinating hobby.