Amen. I have always looked at the OT as stories of the interaction of God with men rather then principles. All of it is given for our instruction and reproof. Even with Leviticus there is a lot God wants to say to us today if you understand that every commandment ever uttered by God was for our good and benefit.
Discussion of the proper use of the OT came up many times in the adult Sunday School I used to teach. There is quite a lot of hogwash being taught out there. I even briefly had in class a Marcionite that rejected the canonicity of the OT. He was always good for a lively discussion.
What I taught is that all of the OT is literally true but not all of it is literally binding on Christians. It is to be spiritually understood and inwardly applied. For example, the bloody cleansing of Canaan by Joshua (always a hangup for younger believers) can be understood as a commandment to mercilessly exterminate all strongholds of sin within the believers own life, no matter how innocent or even profitable these sins may seem. Likewise, the Levitical laws established the Hebrews as a "peculiar people" unlike any other; so, too should the believer stive to separate themselves from the world, not by avoiding certain foods or wearing certain things, but by avoiding the snares of sin and putting on Godly habits.