And Jazz
And Beetoven
...
Oh yes!!! They called jazz noise because of some of the very same reasons they call rap noise (mind you ...a lot of rap is noise)! Here are a few reasons - no discernable melody, too much syncopation, bass timing on the 2 and 4 instead of the 1 and 3, and the over use of rhythm i.e. drums. Musical taste - that's what it boils down to. My taste goes past genres. I like Classical (but not all Classical) I like most Jazz, and most Gospel has its roots in Blues and Jazz (some would like to tell you its the other way around - Thomas Dorsey - the Father of Gospel Music - was a Blues/Jazz musician first).
I think a lot of people get lost in the syncopation of most rhythmic styles of music. Because of this syncopation - you must actively listen to hear the lyrics (especially in rap). The "beat" can hypnotize you - but if you are used to hearing that - you tend to focus on other aspects of the song - you literally dissect a song into its individual layers - for my jazz train of thought:
Rhythm section and Bass - holding the groove together
Lead instruments and melody - the basic thought or feel of the song
What I like to call tasties - or incidentals (or dynamics) - things that give a song its character soft to loud ratio, ect.
And if it has vocals - what is the artist saying - and how are they presenting their message.
These are the things that go on in my mind when I first hear a song - with rap, my train of thought is a little different
Content, flow, style, and cadance - I listen to what you have to say first - if its poppy - or bubble gum - click - next!
If you pass the content test - next I listen to what have you borrowed from more traditional styles of music (samples, patterns, are their any real instruments being played, are your samples creative and obsure).
I'm not going to list the beat because it's always there.
I approach different styles a different way. Most people that I know that enjoy all genres - generally do this. Those that are stuck - usually look for the same things on every type of music, It's like going to Pizza Hut and ordiering seared Yellowfin ... you're not going to get it, and you leave disappointed. I know how to enjoy prime rib, but I know how to enjoy a good hot dog too.