If forget about interesting, really need to earn money to support living. And if still want to work in HK not overseas. Then we must consider the competition with PRC. Please note that many yound people in PRC love Hong Kong (especially those not having network or money or power in PRC). Of course they love overseas (like USA, Europe) as well. They love HK because of fairness, free atm.
So, current generation or coming generation please try the best to go for those less competition with PRC comer.
For which career that less competition? please think about what are the deficient area in PRC nowaday or in near coming future (let say 5-10 years).