First, make a list of your top 8 artists overall. Then, for each of these artists, add the 7 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. The higher your score, the more varied your music is.
1. David Bowie
Tin Machine
Roxy Music
Iggy Pop
Lou Reed
T. Rex
Mott the Hoople
[ ] Bryan Ferry
6/7
2. Franz Ferdinand
Kaiser Chiefs
Arctic Monkeys
Kasabian
The Fratellis
The Killers
The Strokes
[ ] The Last…