As the comments show,it depends on the person and the background from which he/she comes. Memories make us appreciate certain sounds.
For me,I was born 50 feet from the shores of the Atlantic ocean and the sound of the ocean is my favorite sound. I have others ,like the sound of a stream running through a forested area. The sound vibrates and echoes all around you.
Depending on your situation,the sound of a car in the driveway at supper time ,can be the best sound you ever heard.