I use both Windows and OS X for different things on different machines. I take no part in the factional warfare people seem insistent on waging over them, and trying to dismiss me as a fanboy is both ad hominem and a strawman.
Earlier you said "The can, but that's about it. If you will do that separate partition with windows, you might play few older games on lowish settings" - implying that even on a Windows boot a Mac was somehow inherently inferior for gaming, which just isn't true. You've either got the hardware or you don't, Windows doesn't care who assembled it.