Having worked for a HNWI i would say its like all jobs - personality is so important. I've worked for people that have treated me like dirt and people that have treated me like a respected professional, ally and confident. when you work for a HNWI you don't keep your own schedule - you work to their schedule, you're always 'on'. I used to get phone calls on Sunday morning at 4am because his driver in Argentina (or wherever) hadn't come round the corner yet. But the perks can be amazing - you travel with them often and deal with some interesting and powerful individuals. Its a job best suited to people without any family commitments in my opinion xx