The phrase "favorite fall" is likely a typo, as it should be written as either "fall favorite" or "my favorite fall." Assuming that it was meant to say "my favorite fall," this could refer to a person's preference for the season of autumn. Autumn, also known as fall in some regions, is typically associated with cooler temperatures, changing colors of leaves on trees, and harvest festivals. It may be someone's preferred season due to personal associations or simply because they enjoy the beauty and coziness that comes with this time of year.