Sure I have two Macs here at the house but we primarily use one of them for Video editing and the other is used for doing my Ustream show. Otherwise I am pretty much on Windows PCs 95% of the time.
I did take my Mac with me to a meeting the other night and when I made a comment that this was not my main machine I got some funny looks from the Apple users there.
Several asked why, and when I told them I am more productive in Windows they about lost their minds. But hey — to each his own. My kid uses the thing more than I do and most of the time I have to force-kill Safari or Firefox because some Javascript kills the browser. That does not happen on my Windows machine.
So when I was asked if I was going to upgrade my reply was “Why should I?” Just like I have not upgraded to Windows Vista at this point in the game there was nothing compelling enough to want to go spend the money.