How to use "hobby" in a sentence

Cham had a new virtual hobby now - riding - and he talked happily about going out on horses and competing in races with Ding and Palo

The walls of his den were lined with examples of his hobby

"You think he's licensed for instrument flying? Most businessmen-pilots and hobby pilots aren't certified for anything but daylight."

'You see, because I live alone, I need a hobby

I could, of course, choose sewing or drawing, but my hobby is Human Nature