Jackie Paris is awesome. Most current rap stars are not very good rappers, and rely heavily on autotune to mask timing issues, intonation, etc.. Autotune can be used effectively on its own as an instrument, but it is overused.
Kendrick Lamar is pretty damn good, and there are others. I prefer old-school rap and harsh, staccato delivery with complex wordplay. As with any genre of music, there's good and there's bad.