1) The lyrics are amazing.
2) Once you get past the fact that it's not bumping dance music you realize that R&B isn't appreciated as much as other genres and it deserves a chance.
3) It's just cool.
So take a listen on Spotify, YouTube, or Itunes sometime. I am not a huge R&B fan but after listening to Sweet Life and Forest Gump I have learned to love the entire album. Start with those songs and see where it takes you.
Here's his video for Swim Good: