For Calvin, if a practice wasn’t prescribed in the Bible you didn’t do it. On the question of the relation of faith to reason, Luther came down heavily on the side of faith. Calvin came down on the side of reason. Since this partition between the dominance of faith or reason has been one of the great dividing lines of the history of the Church, it’s no surprise that it made a difference between them.
There are those today who take the view that the founders of the Baptist denomination (the ones who were right, anyway,) were Calvinists – and therefore all Baptists ought to be as well. This might be called the historical argument for Calvinism.
If Peter is supposed to be a Calvinist warning against the Arminian interpretations of Paul (as I’ve heard some say), then he certainly chose words unlike any Calvinist I’ve ever heard…
I believe the vast majority of Calvinists seek to be clear about their belief in Calvinism when interviewed by a pastoral search committee. I personally know some Calvinists who seek to make this very clear in the interview process. However, and quite unfortunately, that is not always the case.
Individual Human Responsibility. A major weakness in the Calvinist scheme is found here. It is a basic teaching of scripture that individuals are held accountable for their sin. This is the basis for judgment in both human law courts and the divine court.