To really understand the airbus you need to know exactly what you are commanding with the side stick.
With left to right & vice versa movement you are commanding a rate of roll. So with the sidestick in the neutral position you are commanding a zero rate of roll (so if banked already you will maintain that bank angle)
With fore and aft movment you are commanding a load factor, with the stick in neutral you are commading zero load factor.
This is all subject to the limits that previous respondants have commented on.