Before I had to worry about space and moving my music around. Now it's on every device. Has all my playlists, all the music I listened to + discover new stuff, friends can send me songs I might like, can even download for offline if I'm worried about not having internet, etc.
It's been a much better solution than playing everything in Winamp which I used forever or iTunes.
VLC is one of the best open source programs ever written. I use it on mobile+notebook for video and music (320-encoded files on a 128 GB SD card). Youtube/many other apps are just not OK in quality.
At work, people get awed all the time - "wow, is that Winamp?" :D
And I keep thinking, what the hell are people using these days?