I'm always surprised Christians even talk about the "nice guy"...
The idea of "nice guy" is interpreted by the world. The nice guy is a guy who is effeminate, always kind, even to those who are not kind to him and a guy wouldn't stand up for what's right. Biblically, this idea of the nice guy is not the ideal. Godly men are not effeminate. Biblically, men are to lead in the church and in the home. Men are shown as willing to stand up for what is right which is shown by the example in the book of Daniel where young men never gave up God and instead walked into fire for not giving up their faith. Daniel 3:25 He said, "Look! I see four men walking around in the fire, unbound and unharmed, and the fourth looks like a son of the gods." Or how about David when he stood up to Goliath? How about Joshua who said, Joshua 24:15" [SUP]15 [/SUP]And if it seems evil to you to serve the Lord, choose for yourselves this day whom you will serve, whether the gods which your fathers served that were on the other side of the River, or the gods of the Amorites, in whose land you dwell. But as for me and my house, we will serve the Lord.”
The bible shows righteous men willing to stand up for what's right. Scripture gives example through Paul that we shouldn't ashamed of the gospel. That we should preserver. That we are to present ourselves as living sacrifices and to be willing to stand firmly on our morals and that may mean saying unpleasant things like God's judgment on sin. That may mean calling out what's right and wrong. Or even putting yourself in danger for the faith. This kind of behavior doesn't resemble the unwilling nice guy. This behavior resembles Godly men. So, nice guys which is defined by the world isn't what is ideal, but instead to look to be a Godly man is the ideal. Jesus was willing to be tortured and be killed on the cross. Let's be like Jesus instead.