While I've always liked Dreamy Bearded Rooftop Paul, (it's one of my favorite looks for him! lol) I also like his look as Moptop Paul, and "I am the Walrus Paul", and Sgt Pepper Paul, and 1997 Paul (when he was knighted) and especially like how he is today ... I guess it would be too difficult to choose a favorite look for him, my favorite would be whatever photo I happen to see of him at the time, lol. They're all good.
I think he looked good with a beard in the "Let It Be" movie and on the cover of the McCartney album
I think so too. The photo of Paul holding baby Mary on the cover of McCartney was an especially sweet photo. It's interesting he had a beard in his early relationship life with Linda, and for some reason left that behind as he matured... and hasn't grown another one since... but it was a good look for him.
If he ever decided to grow another beard, I'm sure he'd be able to afford to have a stylist maintain the look he likes. But if he chose not to have one, he'd always look great no matter what, so he can't lose..