In my opinion, I'd more than likely still be using Ubuntu Linux, because for as long as Windows is a major virus target, it would still be safer having the choice of running either Windows or Ubuntu on the same machine. That is what I am doing right now. Just in case Windows crashes and it could not be opened for whatever reason, Ubuntu will be able to access my Windows files.
But I really do not have any problems with either OSs in terms of usability. As long as they serve my purpose well, and I have the time to tweak them, I don't think I'll be bitching about either every so often.