I work with a large number of paragraph, character and object styles. Even though I can order them alphabetically, it's still tedious to find the right style since the panel is so small. Grouping them is another option but I find it just adds another level in the hierarchy and adds to the already crowded assortment of styles.
It would be nice if I could assign a color to 1 or more style definitions and also be able to Sort By Color.