I grew up in a Unitarian church, and still subsribe to many of the principles. And I don't consider myself a
Christian at all.
My father is a minister in the church, and he is also a vocal atheist. (No joke.) So you had better re-evaluate any ideas you might have of us Unitarians as Christians.
Many are secular humanists, others recovering catholics, still others lean towards neo-paganism.
While it started as a renegade transylvanian branch that rejected the trinity, Christianity has been left far behind by current evolutions. The way I see it, most unitarains believe that the important thing is to search, not to believe. We help each other to search, find, and search again.
If you ask 100 unitarians what unitarians believe, you'll get 100 different answers. And that, in itself, is the best definition I can give.
All that said, I'm growing apart from the church because the people in it tend to be opressively intellectual about things that I consider intuitve and beautiful. Many of them are, in a word, hung up.