I love the OT. Generally, it foreshadows Jesus. One must remember that the chosen nation of Israel had to grow in their covenant relationship with God, just as we individuals must grow in our relationship with Christ. Otherwise, there was no reason to wait to send Christ into the world. The OT contains great wisdom and insight, and it teaches us many, many valuable things about the Trinity.
Another OT fan here. Christians who only read the NT are missing out.