I don't listen to rap usually, but I have a few good rap songs I like.
My favs:
Pretty much anything Eminem (mockingbird, Lose Yourself, Love the Way you lie, etc)
Most K'naan songs (Somalia has some awesome lyrics, listen to it. Bang Bang is alos good)
T.I. - Get Back Up (His new album came out recently I think, but I only downloaded this one. His only other good rap song is Live Your Life, which is more Rhianna bailing him out than anything.
Remember the name - Fort Minor
Over - Drake (I just fell in Love with the guy, no homo)
Magic/Billionaire (Both I guess are rap? Technically)
Most good Flo Rida Songs (Right round, In the aire, Club cant handle me)
Lots of Kanye West
Temperature - Sean Paul (old but still good)
Do the John Wall - troop 41
Akon's raps are pretty good
Last but not least, Lonely Island
I really cant stand Lil' Wayne in any song outside of Let it Rock and I Made It. He just annoys me. He even ruined No Love, which woulda been pretty good otherwise.