I've made one great test, one which is kind of fun and one, well, less successful test. You decide which is which!
There is also a test in Swedish which isn't working properly, so if it shows up on my profile, don't take it (even if you are Swedish).
Some of my favourite authors are: China Miéville, Ursula K Le Guin, Kazuo Ishiguro, Gene Wolfe, Clifford D Simak, John Banville, Iain Banks, Tove Jansson, Philip Pullman, Michael Moorcock, Michael Chabon, Alice Sheldon (also known as James Tiptree, Jr), Kurt Vonnegut, Junot Díaz, William Gibson, Terry Pratchett, Tolkien, Jo Walton, P C Jersild and Richard Morgan. Don't assume that this is a complete list, though, or that I have read everything or even most works by all these authors.
Regarding music i mostly like indie and alternative stuff, but also som reggae/ska and some folk music. Favourite bands include The Lucksmiths, Popsicle, Hefner, Belle and sebastian, Sibiria, Lovejoy, The Wannadies, Gorky's Zygotic Mynci, Math & Physics Club, Ant (Antony Harding, that is), Pipas, Cats on Fire and so on. Oh, and let's not forget My Bloody Valentine.