A hobby is an activity that you enjoy doing in your free time for relaxation or pleasure.Some hobbies that I know of include painting, gardening, photography, cooking, reading, and hiking.People usually collect items such as coins, stamps, vintage items, souvenirs, antiques, and action figures.A thematic collection is a collection of items that are all related to a specific theme or topic, such as collecting different types of postcards or comic books.My favorite hobby is painting, as I find it to be a therapeutic and creative outlet for me.