I dont want to sound offensive, but personally I hate rap :/
Rap has two sides of it. It has a side which I respect, where its about fighting with words, not fists, about sticking together as brothers and all that
Then it has a dark, sick side. Where violence is encouraged. I mean, a couple of weeks ago on Tim Westwood show I heard a song on it where every other line mentioned the word ni*** (you know what it is :/). Then some guy came on saying you havnt heard rap until you've heard Tim Westwood etc etc. He closed with "So listen to him, ni***". Also a lot of chavs listen to it D:
But as long as you dont go into that habit, enjoy yourself and good luck!