First, make a list of your overall top-20 artists. Then, for each of these artists, add the 6 most similar artists to your list. Delete any duplicates, add up the number of entries on your list and this will give you some idea of how eclectic your listening habits are. A score of 6 represents an extremely unvaried musical taste while a 120 represents an extremely varied one.
Top 20:
1. This Providence
2. Chiodos
3. Mindy Smith
4. Eisley
5. Queen
6. Brighten
7. The Audition
8. Circa Survive
9. Anthony Green
10. Underoath
11. The Medic Droid
12.…