When adding new SerializedMonoBehaviour components in the editor I have noticed all [OdinSerialize] fields with class types are initially set to null and not the default constructor value. This makes it tedious to go through these fields and select the non-null version yourself. I think it would be a better setup to go ahead and set the fields to the default constructor value instead of null. That's what Unity does by default. Being able to set fields to null is a huge advantage but it's far more common to actually want the object there.
Issue #63 resolved