I listen to everything, I go from pop to metal to country. I could be listening to Aerosmith on a good day, then Britney Spears on another and the next hour or so Lamb of God will be booming on my iPod.
Nothing beats classical music. I have been listening and playing classical music ever since I was very young. I personally believe that Classical music is the best genre of music for REAL musicians such as Fisher Tull, Peter Tchaikovsky, Ludwig van Beethoven, Mozart Amadeus Wolfgang, John Barnes Chance, and other great musicians that composed amazing pieces of music literature.
I can listen to anything really. As long as the song is good and catchy, then I'm fine, however, I'm not into the music that we hear today. (Ex: Lady Gaga, Lil Wayne, Justin Bieber, LMFAO, ect.)