Really there's only been a couple artists lately who have really been keeping me in the game when it comes to Hip Hop:
Atmosphere - Everything they come out with is refreshing, new sounding, generally positive, with a good mix of storytelling and rhyme patterns. Three years ago Atmosphere was just a blip on the radar in my mind, but they consistently make tight music, and they consistently release new music so its nice they arent shelved like other rappers.
San Quinn - From A Boy II A Man was a very tight concept album, doing the whole album completely sober during the day time, venturing away from a lot of the lies and BS you hear on most gangster Hip Hop CDs. Not even his best work, but cool to see an artist say forget about what other people think, Im going to do this one with me being me.
J Stalin - Its awesome to just hear RAW talent in the game and LiveWire's sound is raw. Unpolished and not perfect but EXACTLY what is needed to pass the torch from generation to Generation.