While I enjoy all three trilogy albums, my favorite is the Past. On The Song Is You, I believe his fourth version of it, Franks sings it with so much authority. When he hits the verse at the end, "THE SONG IS YOU!" so full of confidence. He knows he's number 1.
I also enjoyed Street of Dreams a lot. A great song for Frank.
And one of my favorite oldies, It Had To Be You. Very moving version.