As my older Windows desktop slowly deteriorated into complete uselessness and I was not looking forward to buying a new PC, on a lark I ordered the Vector Linux SOHO CD and made the jump to Linux.
I'm not completely new to Linux from past employment - but having it on the home PC (for my wife & kids too) was a big step.
Very impressed! The computer is MUCH faster - totally renewed. Lots of games for the kids and my wife can still access her MSN and digital camera (her two main uses)!
Very happy I made the switch.