I have thought many times about the answer to the question, "Why are you a Calvinist?" Asserting a stance on the doctrines labeled by a certain man's name ignores the inherent truth within them found entirely in Scripture. The Doctrines of Grace are not fabricated solely on one man's systematic theology, only expounded upon. Any study of Calvin would reveal his consistent appeal to the Church for purity and piety toward God. But he is not the origin of these doctrines, nor is he the only authority of them.
I am not a Calvinist, I am a Christian. It just so happens to be the same as telling the difference between the jars of jam from those of jelly. I believe and affirm the truth of God's Word. I also affirm the doctrines of grace because they explain the condition of the Modern Church and why its so difficult to find truth amongst the very people who claim the name of Christ yet live like Hell in the mean time.