Welcome babyface!
Now here's my take on U2 attractivity:
Bono is out and out the sexiest- it just oozes out of him, and wafts about him like a cloud of perfume.
Larry is the hottest- he's boyish and manly looking at the same time, rowr!!!!
Edge has that soft kinda intelligence about him- doesn't have the great presence like Bono, but has this understated, modest, geeky charm about him, oh yeah.
Adam is a bit crusty looking imo, but he's got this aura of cool surrounding him, and this suave mystery about him.
Yeah. They've all got something, a perfect mix! Now if they were all "hot" or "sexy" or whatever, then it would become monotonous.