Joker, i have only three reasons why i prefer my pc myself.
1. it's cheaper for the same amount of power/capability/reliability
2. It's easier to find a piece of software for just about ANYTHING you'd like to do, find it free
and find it fast.
3. There's no Autocad for mac.
Having said that, not once in my life have i doubted that macs, look better and are much easier, leave alone that their whole approach to things is much more respected in my book.