I don't think Morrissey likes PFTLT because of how it was received when it was released. I seem to recall that critics gave it bad reviews. Still, I love it and would love to hear it.
SYL just means so much to me though. It came out at the peak of my obsessive Morrissey-love, back in the days when I still thought he was a God. (Now he's just a really talented artist -- the MOST talented artist, but I still think I keep him in the religious section of my brain since there's nothing else perched on that spot.)
I hope he heard you and I hope he sees this... And I hope he's in the mood to add something new to the set.
Re: I wish Morrissey would sing "Sing Your Life" when he gets to the U.S. in December
I've been saying put it in the setlist for years. I'd die and the place would go ape shit. It's (one of) the quintessential Moz song, imo. Nothing else on the setlist is as rockabilly (maybe WDYFOFY?) and he should get in touch with those roots. The conditions are ripe.