Anecdotally, I love the personalized station Apple Music generates for me. I have pretty eclectic, cross-genre taste and the quality of the personalized station - the mix of stuff I already love and the new stuff that I don't know yet but that I end up loving - is by far the stickiest part of the service for me. It also seems to be improving over time? I know, anecdotal, but that has been my experience..