One thing I have discovered in this transition is that I find the fanboism illogical and pretty much pointless. I've found that I can, for the most part, do about the same sorts of things in one OS as another, though the process is different. Yes, there are some applications available on one but not the other, but I have not found anything that forces me to believe that one OS is superior in all ways to another.
I can appreciate the differences and pros and cons to various operating systems, but I honestly get annoyed by people that attack or bash another OS with broad statements like "Well what do you expect from Microsoft?" or "Well I can do that on Mac why can't I do it on Windows?" Worse, it's never appropriate to associate an OS choice with a personal character flaw of an individual as often happens in flame wars. Windows, Mac OS X, and Linux varieties are all tools and should just be seen as such.