I am a recent Mac convert. I've been using Windows as a desktop forever (even though I'm a Linux geek at heart and only use Windows because of the applications I was using).
To get my feet wet, I bought a cheap Mac Mini and used that for a month. I figured if I didn't like the Mac I could always give it to my programmers or put it in my theater room. After using it for 3-4 weeks, I'm sold on Mac
Why I like the Mac
1. It's more stable. One application crashing doesn't lock up the entire box
2. It's got a Linux (BSD) backend so I get the best of both worlds
3. It's faster
4. It's easier to use (and I'm a power user and serious computer geek)
5. It just "feels" smoother to me (hard to explain)
6. I have as much or as little control as I want
My new Macbook Pro arrives on Monday
-- Bill