It would be convenient to have custom attributes having a default value.

I case you create a recipient manually or via an import you can control the field value. ( yes/no in my specific case )
In case a user self registers, that custom attribute is left empty where I'd like to have a "no" by default.

In my case, it induce incorrect condition check. In case of a self registration, value is not set and all condition check fails... concerned questions are not prompted whatever it is waiting a yes or a no input.