A hobby is some thing which you do in leisure time,not as part of your daily job.
Make sure each one among us to have a hobby according to our likes/dislikes.
It can be anything which can add a little more value to your life.
If you are able to generate additional revenue from your hobby that can give you a different sense of satisfaction.
An ideal hobby should help you enrich more as a person, refresh you and make your life more colorful.