Windows 8 is amazing, I am using it right now. Only reason a person would not like it is because it is not user friendly enough for them (basically they are stupid when it comes to computers.)
Honestly, a lot of the people I know in tech support and those of us who build computers with any kind of regularity are not at all impressed with Windows 8.
You have to fight it at every turn to get back to an interface that functions fluently for a desktop (it likes to default to idiot-tiles the size of a milk carton), and it was just not designed with mouse-and-keyboard functionality. It was designed for tablets and phones and the only real thing it brings (back) to the table is having a Kernel that can operate on ARM based architectures. It's been enhanced with some power-saving features and some other nice things that give it lightning-fast start-up times and good battery life on ultra-mobile platforms... but it's really not all that substantial of an upgrade over Seven (for a computer).
By all means - Phone, Tablet, or touch-enabled laptop... probably not a bad idea.
Desktop or power notebook computer? Probably in more functional territory with Windows 7.
Unless they release a Service Pack that allows you to pretty much can their interface they've been trying to cram down everyone's throat thus-far (I don't see that stance lasting very long - almost no one in IT finds 8 to be a good buy and it looks to be going over like Windows ME).