While I still have a Windows installation in a triple boot config (Linux Mint, PC-BSD and Windows), I would much prefer to play D:OS on Linux.
Same here, I have dual boot but I rarely use it because it feels like visiting that weird uncle that nobody really likes.
The only reason I kickstarted was for the linux release and I simply won't play until it arrives.
Meanwhile my brother whom I gifted my second kickstarter key is enjoying the hell out of D:OS on windows which makes the wait even more painful...