Mac is going to get more users because of Boot Camp. I have also been a Windows user, but a glance at a Macbook was enough for me to really want it more than I wanted an iMac. If you are someone who is aesthetically inclined, the Mac has a very sleek design. The GUI is also very nice. From what I hear, the OS X is stable and mostly rid of virus and malware attacks. So it has got most, if not all, of the pros.