I switched from PC to Mac after years of being a Mac-hater. JTG gave me his old iBook and from that moment, I was hooked. I never realized how much work I had to do to maintain Windows until I gave up my PC to my gramma.
I currently run Vista (less than legal) on my Intel Mini and I'm planning on getting an MBP here in the near future.
My ONLY complaint, how everyone's talking about the inability to upgrade the mac. COMPLETELY untrue, I upgraded my mini from a 1.5GHz CoreSolo to a 1.86GHz Core2Duo, and the Mini is the least upgradable. You like everything else need to know what you're doing.
Hell I recently upgraded my old G4 PowerMac from 400MHz to 1.55 Dual CPU, and upgraded to a 128MB video card.
Of course everything I own is ram maxed.
Oh...and on topic, after doing XP tech support for a couple years, wait till Vista SP1 comes online.