Medieval music
Bach
Mozart
Beethoven
Schumann
Tchaikovsky
Sibelius
Stravinsky
Ravel
Gershwin
Bernstein
Vaughan Williams
Everything else, paintings, statues, buildings, the lot
Archeology
Geology
Botany
Growing things
The almost boundless diversity, beauty and complexity of the living world
Evolution
Any science that hasn't got too-hard maths in it

I have some blind spots, among them Handel, Britten, Elgar, Copland (bloody awful), Bruckner, Berlioz, Chopin and jazz. And I've never willingly read a novel from end to end in my whole life. I find most of the poetry I read to be contrived and strained, though I have a soft spot for John Betjeman. I can see how good Shakespeare is but I dislike too much theatricality. And Tracy Emin and Damian Hirst can just get lost.