Gradient fills. Sure they look great, but they are everywhere these days. It seems bad taste to have a single color on your web site. If it isn't a dark to light or light to dark color blend then it's, like, so last week man.
Geez even Ford Motor Company have been at it. The solid blue oval has been replaced with a gradient blue oval.
As fads go, I don't think it's a bad one, but I think in a few years, with the benefit of hindsight, gradient fill will be as cringe worthy as paisley ties and 70's flares.
You heard it here first!