Stand fast therefore in the liberty by which Christ has made us free, and do not be entangled again with a yoke of bondage. Galatians 1:1
We were made for freedom. God's every interaction with us is on the basis of freedom. He doesn't force us to do anything. He would like a relationship with us, but He does not force Himself upon us. We are free to choose Him, and free to reject Him. We are free. The hallmark of any mature relationship is the freedom to choose that relationship. Whether discussing marriage, friendship, work relationships, business relationships, or our relationship with God, choice makes the relationship work.
Why is it then that we choose the relationships that we do? The mature, healthy individual chooses relationships on the basis of mutual benefit. God wants us to choose to have a relationship with him on that basis as well. He gets something out of it, we get something out of it.
So what do we get out of it? One of the more obvious answers is eternal life, but I don't think the mature individual chooses God on that tenet alone. We still have a life to live here, our entire existence can't be focused just on eternity. Do we get anything out of having a relationship with God now?
It is a common misconception among Christians and non-Christians alike that God for some reason doesn't want us to enjoy life. Many believe that God's desire for our lives is that we become holy and that somehow, enjoying our lives is inconsistent with the idea of holiness. Furthermore, many believe that God takes pleasure in our sacrifices, rather than pleasure in our joy. But Jesus Himself said, "I have come that they may have life, and that they may have it more abundantly." John 10:10
I believe that God would much rather see us full of joy than full of sorrow. Wealthy rather than poor; God prefers success over failure. Psalm 35:17 says, "Let the LORD be magnified, Who has pleasure in the prosperity of His servant." A God who loves His children is a God who wants to see them experience good all their lives. It is God's heart to bless, not bring harm. Our choices often bring us harm, that is not God's heart, He would rather see us learn how to make good choices, and as a result be blessed
God wants us to choose a relationship with Him because it is the beginning of an awesome life! Not necessarily a life of church attendance and ministry work, but a life fully lived, in whatever form that takes for you.