I'm rather surprised people complain about microsoft office, the ribbon, and the interface. I actually liked the ribbon. It was used by other programs such as 3DS Max: and it's still just as helpful as it is in office.
But I guess most people are stupid and are too dumb to remember where anything is (these types of people wouldn't use 3DS Max I presume). The ribbon makes editing things amazingly fast. Seriously. The layout is all logical, and it looks cool.
First of all, you can remove and minimize the things you don't want (a nice option, because, if you WANT to have extra options, you won't have that choice in a watered-down office program). There are some very useful features that can be added: it's fair to say most people won't use them, but then again, most people using a computer are very thick-headed.
With that aside, usually I prefer windows. It may be considered as poorly programmed: but it's *mainstream* (supporting all major applications) and generally doesn't resort to odd-ball things found in macs or linux.