The same as every one, I used Windows all my life since windows95. I work at an IT provider company, I have many technical certificates and in specific Microsoft certificates.
Few years i started a side photography business, started doing weddings, engagements etc ..
I was so frustrated on the amount of crashes I have on Windows, time after time, plugin fails, then when un install and install back, it is not working correctly, defrag, clean reformat. I ended up having a dedicated computer for my photography work only, still .. month after month. I waited for Win7 might resolve the issues windows had, but it seems it was the same *&^* different name.
I always bought top of the line brand machines, either Compaq, IBM, Dell XPS. Still same problems.
I fed up and bought my first IMac27 almost a year ago, since then my life has been nothing but a breez, productivity over the roof, work work work, no crashes, doesnt slow down, no difrags to cleaning .. nothing, One here something strange .. a month a go I had an application crash!! seriously, this is the weird news!!
Now I am waiting for the new OS Lion to come out next month to upgrade, never .. ever .. ever in my life, I used an OS without a problem/reformating till the next operating system comes out.
I bought 2Iphones now for my wife and I, next purchases will be 2 Macbook Pros when budget permits.
There is a reason why most of creative/engineering departments uses Mac!!