Bluescreens only occur for:
A - people that don't know how to operate a computer
B - people with defective hardware
Mac is for -
A - people who are too simple to use a computer with options
B - people who like to get ripped off for pretty boxes
C - hipsters/fags
Windows has a purpose...it supports the most hardware, has the most software, plays all worthwhile PC games, and is perfectly stable if you have a slight amount of common sense.
Linux serves a purpose if you need maximum stability/security and a broad selection of software/games isn't too important
Great for file/web/whatever-servers.
Mac...well, it's for people that believe the OS is the reason their computer runs slow as shit, blue-screens, has popups/viruses, etc...and they are surely not to blame. It's for fags/hipsters that buy severely overpriced apple shit because everyone else does, and like to put Apple decals on their Prius because they are THAT COOL. They have this false sense of security that their OS is "more secure," when in reality it's typically the first one hacked and only "safe" because the userbase is so small it's not worth developing malware for.
I've used it...it's not that special.
Linux/Windows > Mac