The most common problem I have seen with people moving into the Bus, is the expectation of a "normal" feedback from it. The Airbus is not designed to be hand flown, so the feedback from the stick, is different from other types. Not any more or less difficult, just different. All pilots adjust to it fine, however I have found younger pilots, used to playing computer based games, adapt quicker.
One of the first things we teach is to stop stirring the pot. New Bus pilots have a tendency to over correct, getting themselves into self induced osscilations. This basic rule is to just remind guys to just let go of the stick when they start to do this, allowing the aircraft to stabilize.