John is truly the father of music psychology for a reason. Yes, the research at present time is outdated. but the knowledge and curiousity of Sloboda inspired many. For me personally, his indepth description of the relationships between language's structure and music's structure mixed with perception so interesting. he deeply applies chomsky's language theory to music's dimensions. e.g. I loved his example of composers writing meter based on expectations of the listener's grasp on consistancy. When not following the "rules of music", rhythm is similiar to language that when there isnt a consistancy it causes extreme ambiguity. I loved the point of music being different as well -- music is unique in the fact composers can both follow and not follow "the rules" but the listener's perception is still their own, and such ambiguity is apart of the expressive and perceptual differences of music. I also loved reading the differences in performance, and how it affects musicians; alongside musical ability as a whole. As always, I love Sloboda and his work makes me think deeply.