A few posts back I frothed mythopoetic upon the topic of my brand new OS, remarking in a comment that Ubuntu is actually in a functional sense not one OS but FIVE ... different session systems are available, two Ubuntus & three GNOMEs.
As of today, I've pimped up that number to seven.
Of my two new newly-hatched spawn, I think I like Xubuntu the best ... but it's not as if I have enough real experience to make a worthy judgement call this soon. They're a (perhaps interdependant?) tag-team - I went for Xubuntu & got Xfce thrown in along with it - & they're both stripped down & faster alternatives to Ubuntu that run over its original core.