heavy gamer and
some android development and
3d models creation
Some people 'fear' Windows 8 because it runs faster in some games, and some (a very small percentage) may have compatibility problems with the new User Interface.
As for Android Development, Java doesn't work win the new Windows 8 GUI (at all, and I don't think Oracle have sorted that out yet).
3d models creation, the majority of this software is highly tested on Windows 7 x64 Service Pack 1.
Unless you want to develop Windows Store Apps, Windows Phone Apps, instead there isn't much point recommending Windows 8 to you, even though the chipset and CPU are both 'Windows 8 leaning' (Intel Z77 + Intel Core i7 3000 series).