I stay with Pandora precisely because I can't listen to whatever I want, whenever I want, as many times in a row as I want. That's a whole lot of deciding and deciding takes time and effort. Pandora knows the music I like and is amazing at finding new music that I will like, without any time or effort on my part. All I have to do is turn it on. I have farmed out my music selection responsibility to them and I couldn't be happier about it.
P.S. My friends are always complementing me on how awesome my music is. I try not to take too much credit for it.