I general I love sounds track, I add a little something to the story, to the scene we are watching. I have the complete OST of a love of american movie and/or tv show, therefore is only natural that I pay attention to all the background music/theme we hear in anime.
Again my pick is Psycho – Pass, Yuugo Kanno did an amazing job on the composition.
My top theme from this anime is definitely the Dominator theme.
Closely follow by the Psycho-Pass theme