Direction of Electric Field. Conceptual Question?

You are absolutely right. You see, electric fields are designed with a + charge point of view. They represent the path a + charge would take. And yes, if they were designed using - charges as test subjects, the fields will have opposite directions. The direction of the fields don't depend on source but the charge for which you are drawing them. But the standard is for + charge so all you have to do is remember that + charge move in direction of the fields and - charge go opposite to them.