Most of them at the moment...For me, it's Heal The World. Almost every time I hear it I tear up. It's like Michael's life philosophy in a song. Also, it reminds me of the memorial and everyone up on stage singing Michael's message. That was such a touching and beautiful, though heartbreaking, part of the ceremony.
Also at different times other songs get me, like
Will You Be There
Ben
I'll Be There
We Are The World
Gone Too Soon
That's how I feel.Man in the Mirror.
Smile.
Will You Be There.
You Are Not Alone.
Heal The World.
But I don't stop listening to them, I kind of 'like' (for want of a better word) that his music can bring out so much emotion in me. I want to always have a reaction to it, it just reiterates to me how special he was to me, and how much of an impact he had on my life...