I love all types, but I was raised on R&B/Hip-hop, so that's my base. I try to stay away from mainstream stuff though, I guess as an ISTJ my tastes are less defined by what's forced on you by the outlets and more on my tastes.
Lupe's my favorite rapper. His wordplay is ridiculous for someone so relatively young.
My barber also recommended John Mayer to me, so I'm getting into his collection. He's good.
I got room for about 2,000 more songs in my IPOD ( I have 4,300) So I'm always open for suggestions!