Hi again, Pink Spider.
As ViaCrucis pointed out, we are not constrained to obey the Old Testament law. Those laws were given specifically to the Jewish people and the New Testament (the portion of the Bible written after, and about, the life, death, and resurrection of Jesus) makes it clear that those of us who are not Jews (the Bible calls us "gentiles") are under no obligation to keep those laws (see Acts chapter 15, the 5th book in the New Testament). Even so, all of the Ten Commandments, except the Sabbath Law, are reaffirmed in the New Testament as something we need to obey as we follow Jesus. It's kind of complicated, but put simply: all those laws and rules in the Old Testament have been replaced with a simplified set of "do's and don'ts" in the New Testament. For simplicity, I am going to use NT and OT from here on out when referring to the New Testament and the Old Testament.
It is important to note that we all fall short of what God desires of us, and we all inevitably do things (or not do things) that place us at odds with God and in need of His forgiveness. The good news is that God has provided us forgiveness in Jesus Christ. This is the main message of the NT.
Jesus has told us what are THE most important commandments: love God with everything we have and love one another like we love ourselves. If we love God (worship and serve Him only) and others (put their needs above our own, give of ourselves for their good), then we are pleasing to God.
It has been my experience that when I focus on what I shouldn't be doing, I get tripped up, stressed out, and messed up. When I focus on what I SHOULD be doing (loving God and loving others), I tend to be much better off mentally, spiritually, and socially. I'm not saying that it doesn't matter what God has told us to avoid, I am just saying that our focus should be on doing what is right instead of worrying about possibly doing something wrong.
That said, as you read through the NT you will find that most of what is forbidden there revolves around worshipping false "god's" (the Bible calls this "idolatry") and doing things that are harmful in some way to ourselves and/or others. If you think about it, these things ultimately relate back to the two great commandments: love God and love others as yourself.
As for music, it really boils down to message more than type of music. I have loved rock and metal most of my life, and still do... the thing is, there are A LOT really ungodly and hateful lyrics in many popular songs of every musical genre. My rule of thumb is that if the lyrics are ungodly, then I don't listen to it. Also, as someone else mentioned, if your style of music causes someone else discomfort, it is unloving to play it around them.
Hope this helps;
Mike