Macs cost too much. I can pop down to my local computer store and pick up a decent component (which will run fine for years) for almost nothing compared to what Apple are charging, and pop it into my PC. If something dies (and things do with computers from time to time) I’m not at the mercy of a Mac repair man to get it fixed. I can hunt around for the best bargain and do the job myself without too much grief. With a PC, you can get all of your components at prices that make Mac costings look abusive, and mix and match both old and new components fairly easily. Want to pass on your graphics card and motherboard to a family member’s old PC when you upgrade? No worries with a PC.
If you don’t want to have that kind of control over your computer, or you just can’t be bothered learning, buy a Mac. Mac’s a great for people who like to use a computer without knowing much about what’s inside the box, or who have a lot of disposable income If you want control and the ability to build a computer to be exactly what you want, buy a PC. There are pros and cons to both Windows/Linux and the different Apple OS, so… I think when it comes to being either a Mac or PC user, each is best depending on how much control you want out of it.
Side note: Alienware are like Apple for PCs.