I recently bought an iPhone. To be accurate, I bought iPhones for myself, my wife, and the two kids. Anyway, the three of them give me grief about how few apps I have on the phone that's really a small computer. One of the few I have is Pandora.
Pandora is an internet radio of sorts. You create stations by entering an artist or song, which it plays for you and then cascades from there to other songs and artists who are in the same field of sound and style. It means you don't pick your own songs but go with whatever the algorithm provides.
My wife doesn't like Pandora much because she doesn't have control over what's being played. She wants to pick the song she wants to hear. I like it. I like the new discoveries that result. Besides, I'm seldom in the mood for only one song or artist.
It's a difference in personality. She wants control. I like going with the flow. It works pretty well for us in the marriage, too, as long as we're communicating well about these things. I've seen the same dynamic in vacations, which she likes to schedule. By working a give and take between us, we end up with a vacation that has some structure to it but isn't limned with requirements of being at x place at y time.