Good question GG
As the discussion healed itself I accepted the following.
I think it all derives from perception and what you get out of music.
I like listening to everything I can get my hands on and she mainly stays with what she's familiar with, which to me is boring. She also likes to meet the people that play the music and I think it takes away from the music to get to familiar with the artist behind it. Usually they turn out to be a major disapointment.
Here's an analogy that might help:
We are the same way with food, she doesn't like to try new things and I'm more adventurous.
Does that mean I like food more than she does?
No it just means we're different in that aspect, we both enjoy food equally but for different reasons.
I won't ever understand why we do what we do but we can respect our differences.