I make much of my living supporting M$ systems and networks, but use linux exclusively in the process. Sometimes knoppix, but other distros (both live & HD-installed) as well.

I prefer the "feel" of working in the linux distributions when it comes to various tasks. Eventually, M$ manages to integrate some of the things I like about working in linux, at least in some respects. This seems to go against any notion of M$ being the Great Innovator, ripped-off by others.

I also like various things about a few M$ operating systems and applications, but when given the option, I prefer a linux environment for most tasks. And often there's simply not a M$ equivalent for something I want or need to do.