monotone lip flapping done to a drum machine
What specifically are you talking about?
It would be an interesting discussion to convince those who do not like hip-hop music of its musical merits, maybe convince them otherwise as I tried to do in a thread weeks ago here, but the truth is most people have their minds already made up and nailed closed on the issue without offering specifics to support their opinion.
I make this statement because anyone who says that "hip-hop music has no melody" is probably not exposed to the wide range of stuff out there, no different than anyone who calls jazz "meaningless improvisational wandering with no direction", folk music as "whiny harmonica protest music", hardcore punk as "fast short songs with no talent", or metal as "loud screaming".
Complete bullshit based on little knowledge or exposure.
I honestly don't know what type of hip-hop music people with such opinions are talking about because all of it, in my opinion, has a very linear and direct form of melody, and most of it is actually more melodic than people tend to give credit. As to the criticism that there are no "chord progressions", well that is just plain ignorant of the entirety of the genre as well.
Personally an opinion is just that, but to levy stereotypes on an entire genre and abstain from more meaningful explanation serves no function other than to "get it off one's chest". If that's the purpose of the thread then so be it...