Hi newbie here,
as you may tell, I've had a bit of experience.
My collection is very diverse, I'll listen to anything at least once. I denounce any idea of a hierachy between any musical genres and I love music as it is.
My biggest areas personally have been:
Contemporary classical (modernism/"post"-modernism)
Progressive metal
Jazz (especially bebop, with traditional jazz)
Avant garde everything (jazz, metal/rock, electronic)
Folk
New Age
Indian classical music
Japanese traditional music