I moved one old laptop to Linux over about a year ago, and committed to an effort to actually make it do the things I wanted to do, like play games, and run Windows-only tools or find viable replacements. To say it went well is an understatement. Within a few months I had switched every computer I owned, and I'm never looking back again.
Granted, I was already quite familiar with Linux on the server side. This was not my first attempt to use Linux on the desktop, either. But it was my last, because I'm never going back to Windows ever again now.