Ubuntu is still annoying with it's daily popups asking to update the system and then most times requiring a system restart. In some ways it is worse than Windows.
If you want Ubuntu without the annoying, that's Debian.
I will probably be installing that on my servers soon. Luckily I don't need to use it as a desktop machine any more.
Software & Updates->Updates->Automatically Check for updates:{Daily,Every two days,Weekly,Every Two Weeks,Never}
and Security Updates{Display Immediately,Download Automatically,Download and install automatically}