After almost 2 years of on-and-off spotting an undercut hairstyle, I'm officially done with it. What's next? I've just settled down with a fade haircut. It's a simple, classy and timeless hairstyle. More importantly, it's very easy to manage. Or sometimes, I don't really manage it at all. (As with other things that come with age, my tolerance threshold for allowing my hair to look messy in the public might have increased just a little. Ahem.) The fade hairstyle is the more generic brother of…