That is completely subjective. A lot of people hate Unity, the same way people hate every DE that exists. So much so that some do not even use a DE. Using a DE as an argument for Ubuntu's advantage is weak as they're usually ambiguous. I say usually because it tends to be that Unity, like Mir, isn't really adopted into any other distribution in official repositories. Even more so after Mir's release, since it'll be dependent on it.
