I can't understand the need that some Christians have for feeding their own egos by somehow saying that they overcame their sin nature on their own, and chose Christ. Scripture is clear that we are hopelessly lost, and cannot approach God, except through his work of regeneration in our hearts. We bring absolutely nothing to the table but our sin. It is God who saves, not us.
I have never heard anyone (other than as a Calvinist straw man) claim this.
I guess we agree on this statement, no one can be saved unless convicted and called by the Holy Spirit.
I believe scripture teaches that there is no limit of who can be called, and at the time of the calling man can follow or stay in his sinful state. While God (being God) knows what the decision will be, he allows freedom of choice. The logical conclusion of this line of thought is that we need to follow the Great Commission and do as much as we can to spread the Gospel.
If there is no free will then why bother? Those who are going to be saved can't do anything to stop it and the condemned can't do anything to change it.
I just makes no sense of Jesus last words on Earth was to go evangelize the world if it really doesn't matter. Now let me be clear, I believe God had every right to set the way for man's atonement any way he wanted to. Like I said, show me a Calvinist who doesn't think they or their wife and children aren't one of the elect.