The phrase "one's favorite things about winter" refers to the specific aspects or activities that an individual enjoys most during the season of winter. This can include anything from snow sports, cozying up by a fireplace, holiday celebrations and festivities, warm beverages, cold weather activities such as ice skating, skiing, or simply spending time with loved ones while watching the snow fall outside. Everyone has their unique preferences when it comes to winter, so this phrase can vary greatly from person to person.