Wil Wheaton of Star Trek: TNG fame (or infamy, if you prefer) has posted some thoughts about his recent wholesale conversion to Linux. It's a good read for any of you who might be thinking about taking the plunge but aren't sure.
Before I get to the details, I should address something that I think everyone who makes the switch feels: Fear.

We feel afraid, because even though we're pretty sure that everything is going to work out fine, we've existed on a steady diet of FUD for many years. Maybe we tried to install a distro a few years ago, when Linux wasn't as newbie-friendly as it is now. Maybe we're just a bunch of pussies.

I'll admit it: I was nervous.
http://www.wilwheaton.net/mt/archives/001117.php#001117