When I was very young, of course it was Paul (although he's a lot older than I am, old enough to be a parent) because he was "cute." I do like his music, but I think he peaked with the Beatles, and some of Wings. His stuff since Venus and Mars
(1975, I think) doesn't have the quality of the earlier work.
John is my favorite, I think. He pisses me off, as he could be pedantic at time (I can too, so there's that) but, I do love his music. Of course, John is frozen in time. Paul refers to him as "St. John" because of the way some fans tend to worship him. I don't worship him, of course not, he was a highly flawed man. But, I do identify with him a lot.
We lost a great musician, political organizer and forming elder statesman of Rock when John Lennon was murdered. (And IMO I think G. Bush had a lot to do with it. If you read the CIA files on Lennon, Nixon wanted Lennon "liquidated" or some term like that. He tried to get Lennon kicked out of the country, then tried to have him killed. Bush was the head of the CIA under Reagan, and also worked under Nixon, while Nixon declared Lennon on his famous "Enemy List." Lennon was starting his career up again and I think the far Right felt threatened. Yeah, it's a Conspiracy Theory, but the timing and the people who controlled government at the time were still pissed at Lennon's hand in ending the Vietnam War and his political leanings and his clout among young people. Lennon was out of site for 5 years, but when he surfaced, I think many people, especially War Hawks, were threatened and ready to do what Nixon already put into play years earlier.
It was a perfect storm when he started recording and talking Peace again, when Reagan was ascending in power, soon to be president, and Bush was in the CIA. Too perfect. Lennon was a Pain in the Ass to the Right Wing administrations. They killed Abbey Hoffman, same people, same reason.