I have been in Hong Kong for over a decade and am thinking of leaving. Apart from the usual gripes – pollution, high rents, political uncertainty – I feel my career is going backwards as my industry, advertising, becomes more dumbed down here. The problem is I feel I have become dumbed down at the same time. Would it pay for me to take a refresher course to fire up my expertise and enthusiasm again before I leave, or just jump back into the deep end when I go?