As someone who cant make up their mind - I can say that Christianity has many facets that similar to Pagan in nature. Psalms vs Spells, Commandments vs Redes, Both worship a male and female (though only Catholics give Mary her due), and the Holy Trinity vs the Power of 3.
So it is definately possible to be a Christian Pagan - if ones Christianity is based only on the ideaologies of Christ and the rest of the book is viewed as metaphoric story telling.
Ironically - I was raised essentially Christian, but due to certain aspects of that faith - as mentioned by Nikaia - I have been shying away from that philosophy for the simple reason that if being Christian means accepting the Bible as fact in its entirety - I cannot in good concious do that. It would be hypocritical of me to say I am Christian when I disagree with so much of the faith/rules/philosophies.
It doesnt stop me from celebrating Christmas and Easter - old habits die hard. And the rest of the family is Christian - mom is Catholic - dad is like me and the brothers are born again. And the basic ideals of sharing, giving gifts, time with family, rebirth and the celebration of spring are all good things to celebrate.
It also makes me the first to jump up and argue against any law proposed that is specifically based on any religious view. I am pretty sure that even if I were a die hard believer of any thing specific, I would still support the separation of church and state - it is the primary principal of our constitution and should NOT be open to interpretation.
OOPS - got on my soap box for a moment. Sorry.