I'm a Mac man and proud of it. Got my first MacSE (yeah, the Mac-In-The-Box) probably around '85, but don't hold me to the date. Since then I've had 5-6 updated versions and now use my MacBook which I love.
I use iShowU for screen capture stuff and dump those files into iMovieHD and add sound and edit that in Garage Band. Smooth as a whistle. Now they've got Camtasia for the Mac--don't have it yet.
The only frustrating thing is that there are a lot of keyword tools and "Google scraping" utilities that I'd like but won't run on a Mac.