It's the smell, of course!
Half the fun of laundry is the smell of the wash! I love highly-scented (read: "Ooh that's loud!") detergents and fabric softeners. Original Tide with bleach is wonderfully fragranced, and I am now sold on all of the Downy Simple Pleasures line! Not only do they impart a fragrance that lasts for days, they also are incredible at softening even the coarsest fabrics!