Wow, that's a tough question.
I have to admit that the 'hits' are rarely my favourites these days even though they must of been what caught my attention in the first place. Well, that and those blue eyes.....give me a break, I was 15 when I first found JM!!
I think thangs are continually changing, depending on what is going on in my life, but I tend to go back to certain songs to give me strength, inspiration, or even clarity. It's hard to pin down one song as a favourite, I just know that if I feel a 'need' for some words to sort out my feelings, then burried somewhere on one of JM's albums, there will be song with the just the right lyrics and just the right mood for what I need at that moment.
This probably doesn't answer you question, but it's the best I answer I've got.