First, make a list of your top-20 artists overall. Then, for each of these artists, add the 8 most similar artists to your list. Delete any duplicates, count 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 9 represents an extremely unvaried musical taste while a 160 represents an extremely varied one.
Gorillaz
The Good, the Bad, & the Queen
Blur
Space Monkeyz vs. Gorillaz
Damon Alburn
Daft Punk
Little Dragon
Gnarls Barkley
Deltron 3030
=8
A-Trak
Carte Blanche
Voodoo Chili
A-Trak x Drake…