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I happen to be one that likes both Unity and Gnome3; I gave them both a proper chance without any preconceptions I was even running XFCE for a while but eventually figured it wasn't for me.
It seems certain people that complain about Unity and Gnome3 haven't really used them with some just riding on the backs of what others are saying. As for Gnome3 being like Unity? That's like saying oranges are like nectarines.