As a whole, I love it. Of my music collection, it has the largest collection of songs. Sure, there's a lot of shit nowadays, but you can say that about anything. Rap music is no exception in one way or the other.
What I think is a shame is how rap music somehow became the go-to subject when talking about hip-hop culture as a whole (which also includes graffiti and breakdancing). And that the usual, nonsensical mainstream rap is what most people are familiar with. Ergo, people from the outside looking in believe that the common stereotypes associated with rap music today are what the culture is about, similar to how some people associate metal with lice-infested long hair and a bunch of low-level growling infused with unintelligible vocabulary. It's simply untrue.
I remember having a discussion with a fellow who believed that since I like rap music, I in turn enjoy shooting people in the street for no reason. It was... interesting, to put it lightly. :/
Aside: Oh how I long for the day for a (decent) fighting game with hip-hop inspired elements. And no, I don't qualify the Def Jam games as part of that equation.