I'm loathe to admit that I really like Windows Live Writer but it's true. It is a really well done piece of software with far fewer creaks and jostles than I would expect. If MSFT could extend that to other applications and/or make commitments to less feature-ful and more use-specific (that term is so fucking lame that it ought to be expressed in UML or something) pieces of software I could actually be interested in some of what they have to offer. Luckily, that will never be the case so I can merrily post away on my work laptop with little concern about the tech equivalent to my eternal soul.
If you're stuck on the platform it's well worth checking out, free, and works with WordPress and other non-Microsoft blogging platforms.