I absolutely hate the "flat" look. Not only hate it, it also makes navigating windows a little more "difficult" since everything flows into each other.
I am always baffled to see how good it looks when I install Aero Glass 3rd party "to bring Aero back"...it's beyond me why MS thinks ugly is better and why people just accept this. I also remember in earlier OS there was the option to use Aero or not.
No surprise there, we don't have that option any more, we need 3rd party hacks if we want the nicer look back.