All sarcasm aside...
I am a PC. And a Mac. I have used PC for years, about 17 years to be exact. I bought a mac about a year ago and love it. I am not a gamer. I don't play games on a computer. If you are a gamer, stick to PC. I use my computer to surf the web, blog, build websites, edit photos, create movies and screencasts...that sort of thing. I use my Mac the majority of the time. Why do I like my Mac? Because it loads faster, doesn't freeze up (not nearly as much as windows anyway), I stay virus free, and the user experience is much better than that of Windows. Again, I use a PC as well so I am not here to dog PC. I do have one point to make though, I have went through 2 operating system updates with Mac (Leopard and Lion) and let me say that it is nice to be using a computer that runs on an operating system where they focus on updating the OS so that the user has a better experience instead of focusing on how much more secure they can make the OS and how they can prevent more virus and system attacks. That said - it Depends on what you use your computer for that will decide which you should buy.