I've gone through phases of just about every Bono era/look being my favourite, and I'm sure that JT was one, at one time. I'm kind of neutral about that hair, now. I like it, but I'm not over-the-moon crazy about it. I still think he was teh hawt then, though. I think for me, it's more face/eyes/smile than hair.
I think whether or not I like the hair is more true in recent years. Elevation was okay. Vertigo was less okay sometimes, depends on the picture. The late vertigo short cut was better, usually. But now, I'm absolutely in love with his current style, suits him perfectly.
I have very simple and yet complex Bono likes and dislikes, apparently. I should chart them.