When it comes down to it 99% of Mac and PC owners just bullshit on the web, watch porn, and play music. I'm a computer tech that deals with a lot of customers so I think I have a pretty good idea of typical use.
With that said a standard user can buy the cheapest PC on the market and be perfectly happy. But I'm pretty sure having a Mac will get you laid. I simply can't think of any other reason to buy one.