Hi!
I really do consider myself to be a Christian -
I believe in the Trinity - God the Father, Son and Holy Spirit. I can recite the Nicene Creed in church without crossing my fingers behind my back, I believe the things I said at my Confirmation. I believe that God made the universe and everything in it, though by a process of setting up the basic groundrules and allowing it to evolve, not a complete work in 6 days. I believe that Jesus Christ was God Incarnate, and that by the incarnation and crucifixion and resurrection he changed for ever the relationship between God and humanity, and that because of it we have the Holy Spirit which we can invite into our lives, and through which we can have a direct relationship with God.
However, I am a liberal Christian, which means that I read the Bible without any "preconceived notion of inerrancy of scripture or the correctness of Church dogma" (thanks to Wikipedia for the words!)
So, no I'm not going to redefine myself as something else!
Heaven - not exactly - but there will be a new creation after this one, in which those in relationship with God will have the chance to take part.
Hell - no need for it - being "snuffed out" is enough
Adam & Eve - no, nice story, tells us about how people interpreted God as Creator, not historically accurate.
Sin - well, we're all imperfect, and that distances us from God, which is one definition of what Christians mean by sin.