Add me to the list of people sorely missing the way Windows Phone integrated seamlessly with my car's BlueTooth. Out of the three platforms I've used, Windows Phone had the best voice command/dictation setup by far, followed by Android and with Siri at a distant third.
With WP and Android I could speak fairly naturally, with Siri I find I always have to speak to it like I'm angry - "SIRI. REMIND. ME. TO. PICK. UP. EGGS. AT. 6PM. TONIGHT."