I doubt my collection could give me away because I listen to such a wide variety.
The things I listen to most:
Rammstein, Rise Against, Killswitch Engage, Disturbed, Bad Religion, Pendulum, Junkie XL, Daft Punk, Enya, Godsmack, Loreena McKennitt, Kitaro, Cold, Staind, Megaherz
I still listen to a lot of stuff that I grew up with, the things my parents listened to like Black Sabbath, Creedence Clearwater Revival, Blue Oyster Cult, Rush, Rolling Stones, Pink Floyd, Molly Hatchet, Eric Clapton, Aerosmith, Lynryd Skynryd (sp?) among others.
In the four years that I've been with my SO, I've sampled a great variety of electronica, which I'm enamored with (I won't even start into the different genres)
A close friend of mine also introduced me to punk/punk rock, which I'm quite fond of now, and another friend of mine got me into metal, which I wasn't too interested in listening to before.
So a lot of what I love now has been introduced to me by friends and relatives, but I always love to hear new things. My collection is constantly growing and changing, much like myself.