I've been using both Macs and Windows for a long time. The majority of people who say Macs suck haven't really used them much. PCs do many things better than Macs and Macs do many things better than PCs.
To be honest, I'd just install bootcamp - it allows you to dualboot between Windows and Mac OS. Hold down a key during boot-up and pick which operating system you'd like to use. =)
Mac-native games are generally slow and don't run as well as they should. Gaming is one thing PCs DO do infinitely better.