Doing M.B.A is good, its as good as cherry on the Ice Cream, in places like Qatar what I have personally seen is that experience wins over qualification. If you possess lets say 5 years work experience being a graduate and you are fresher in M.B.A Qualification, the experience wins over.

I have personally done M.B.A (International Business) its covers almost all the concepts of Office Management, Personnel Management, Logistics Management and so on.

Its up to you, with what you prefer. If you decide to move on from Doha at a later stage of time, i would recommend you to do an M.B.A in your suitable field. HR is good and so is Marketing.. Good Luck