That's easy, expect some attention whoring. That's what McCartney does these days. He's like Bono, but less of a douchebag.
For what it's worth...
"If it was up to me, I’d get more oil tanker drivers drunk. I don’t value music much. I like the Beatles, but I hate Paul McCartney. I like Led Zeppelin, but I hate Robert Plant. I like the Who, but I hate Roger Daltrey." -Kurt Cobain