Still what lots of people do write about is their hobby. Everybody has one, though they may not even understand it is a hobby. Do you like growing flowers or listening to rock music? Do you adore cycling or reading? Even your job can be your hobby if you get pleasure from what you do.
Think about it and you will definitely find the pastime you can’t live without. If you have, then try to describe it. How did it begin? When? How old were you? Does anybody else, any relative or friend of yours, share your attitude towards it? Do your nearest and dearest approve your hobby or not? Can it become your full-time job one day?