Biggest reason of all?
IT TAKES A CONVERT TO CREATE A CONVERT.
We all know people who have used Macs for years and never created a convert. For reasons that aren't clear, long time Mac Heads can't do it. Recent converts can.
I switched back to Macs in '03 and converted dozens of my friends My brother has been using Macs exclusively for 20 years, and he's got almost no converts to his credit.
8 Reasons Windows Users DO Switch to Mac