I have a similar setup and love it! If you haven't already, check out Plex and Plexamp as a way to listen to your library on your phone & computer. Plexamp gives you lots of Spotify-like features including playlists, streaming & download management on mobile devices, keeping the mood going with similar music (via sonic analysis), etc.
Personally, I really just like listening to whole albums, rather than playlists or things of a similar mood. I know I'm old fashioned in that regard, but horses for courses.
