We've had hundreds of threads on this topic in the past; it tends to go well for a relatively long time (compared to some other fora) until you end up with one person who particularly dislikes/disagrees with another person's reason for preferring either an Apple PC, Windows or Linux PC.
To save a lot of talk, here's a summary:
Different people like different things (at different amounts), and use things differently from each other for different reasons. Some people care more about things like, say, aesthetics, and might go for an Apple PC because they like the minimalist aesthetic (personally I'm not a fan).