Do you mean Unity, the Canonical developed shell of Gnome 3? I really dislike it, but it is very easy to install Gnome Shell (my favorite) or another DE like XFCE, KDE or LXDe, not to mention the alternative of directly switching to Xubuntu, Kubuntu, Lubuntu, ElementaryOS and who knows how many other 'buntu-based distros. Personally, in addition to Ubuntu 12.04 Gnome Shell as my main OS, I have also installed ElementaryOS and the beautiful Voyager, a French based Xubuntu respin. Furthermore on a partition of an old dual-core I have Crunchbang, which uses Openbox as VM and is particularly fast and stable. Nothing wrong with Mint, which I supported with a couple of donations until the leading developer, Clemente Lefebvre, decided to alienate some users with a disgraceful antisemitic rant. And for the record, I am not even Jewish.