Ok.. so I am a Mac head. Have preferred Macs since sys 9, but now with OS X mature, robust and with BSD under the hood, it really does kick ass. I have had no problems interacting with Windows folks and there's not a single Windows app that I miss out on. I ran across a fun little list of essential Mac OS X applications that is a good start if you are just getting a Mac for the first time. What is your top couple of Mac OS X apps you can't live without?