What I find interesting that even when I find something that sounds new or is in a different style I didn't listen to before I am still kind of looking for the same things. Last year I went into a bit of a jazz phase, trying to listen to different sub-styles from different times. There's a whole world to explore if you only ever listened to „Take Five“ and there were albums I discovered that I found deeply pleasing, touching and positively challenging. But with all the new approaches to playing music I was confronted with I tended to like those most that shared some qualities with other music I listen to otherwise. One example: I never liked rock's masculine, alpha-male side, so anything that gave me the feeling the musician wanted to present (in musical form) how massive his genitalia are I was out. More inward-looking – yes, please, more. I also always liked music where there's not too much going on on a surface level: Motoric Krautrock, Ambient, Dub Techno, these kind of things. So I also noticed that this plays into my approach to listening to Jazz: Too many notes kind of put me off. So for example I came to enjoy some nordic jazz such as Bremer/McCoy or the latest Jeff Parker ETA IVtet-Album – nice!
What I want to say is that even with open ears there are some things I can't escape. There are shifts in these underlying qualities. I don't listen to agressive music with the same pleasure as twenty years ago for example. But these shifts are less connected to finding new genres or styles.