I'm a Christian.
I don't follow traditions for the sake of tradition, or do anything out of obligation or fear of punishment if I don't do the right thing, but simply as a natural reaction of gratitude. I don't even like to use the word "religion", because it sounds so rigid and forced; I just think of it as my friendship and relationship with my Creator and Saviour.
I devote my life to Christ because I believe he took the bullet for me, and I'm secure in knowing that I've got nothing to fear once I die. Not because I've lived a better life than anyone else, or because I'm a better person, or because I've gone to church more or said more prayers, but because I simply accepted the free gift of Salvation offered to me.