At a blog I was commenting on recently, one person compared Universalism to that of an enabling Father. I responded to that, and I think my reply succinctly addresses why I am a Universalist.
I would resist the image of God in a universalistic perspective being an enabling father. The father of the prodigal was not enabling… he simply never gave up. In Universalism, God simply does not give up. He is always patient, always kind, always trusts, always hopes, always perseveres… and never fails.
It is not enabling to simply not have a point at which you eternally cut someone off. What Father would not always seek after and desire a restored relationship with his son or daughter… anyone that has a cut off point cannot call themselves Father.