I have had the same experience, especially with broken mythtv updates (specifically the mythtv web interface), and also sound.

Plus for some reason every time I update I have to manually edit the grub file to boot the correct kernel and run the nvidia installer. I think it's because I'm still on an older version of grub or something.

I'm still much happier running ubuntu on my server/htpc than Windows. I'd be ecstatic to use ubuntu exclusively if I didn't need to run Ableton Live on Windows, which I can't run in a Windows VM.