When you're doing something you like and love, you feel happiness, joy and peacefulness. When you feel all that, your stress levels are low. You'll see your energy raise above the clouds, you'll be more energetic throughout the day and your inner child will be awakened. Who doesn't want to feel that? :)
What hobby should you choose, you ask? Whatever you like and what your heart desires most. List is endlesssssssss ... If you don't know in which direction you should go, make a list what did you like to do when you were younger. Most people forget about those activities when they get older, but we're not most people, are we? :) Hobbies should not feel like another obligation, should feel like playing :)
And maybe someday, if you're really passionate about something and if you're doing it from you heart, a hobby (or even hobbies) will bring you money or maybe you'll even start a new career.
Be creative, curious and happy about it. Wish you all a happy happy Monday :)