The correct answer is - a habit.
A habit is a pattern of behavior that we are often repeating. Everyone has some habit, be it good or bad. The habits mostly develop subconsciously, and they can be something we like and find interesting, something that we find funny, maybe even something that we are not seemingly fond of at start, but by repeating the same thing for few days in a row we can easily develop a habit, without having the intention to do it in most cases.