Are the children of the middle eastern families spoilt and rude?
It would be unfair of me to make such a generalised statement. One Saudi family i worked for told me that it was Middle Eastern culture to "keep children as children for as long as possible" which was achieved by doing everything for them. My experience in the Middle East was this was more the attitude than it is in the West, its not my place to say if this is right or wrong, it wouldn't be my chosen approach however.
What happens if a family decide to fire you on a whim? How much notice do you have to leave and how easy is it to find the next job? ESP if they don’t give good references.
This happens A LOT. I make sure I have a concrete contract which stipulates a months notice. 9 times out of ten I'm simply paid the notice in lieu. Last job I had 4 days to go (because they were travelling). Got a great reference though. I've never been out of work for longer than 3 weeks, and I'm really picky about jobs now. Mostly I get jobs through word of mouth, I've got a lot of experience, am the "right age" and am English - means I'm snapped up quick!
Bad references don't really exist, its possible to get no reference and the turnover is so high that you have several other references making up for it.
What’s a typical day as a vip nanny like (ok I get that is a hard question!) Get up, take a shower with champagne, eat cavier for breakfast and smoke a cuban cigar... 
No typical day really. Lots and lots (and lots and lots) of travel. I try and make the days as structured as possible for the kids sake, meals at the same time, good nighttime routine, an hour outside activity, a craft activity, a social activity etc - but it massively depends on the family and schedule.
If your day finishes at say 6 do you get to just walk out at 6 or do they expect you to hang around? Hahahahaha... Please find me a job that finishes at 6! Or one that finishes when it says it will. PLEASE!
What were the best family you worked for like? Respectful. They recognise I'm there to do a job and that I need time to myself too. They want to spend time with their children and are genuinely interested in their needs and wants as individuals, rather than how they perceive them.
What is the average age of your charges and how many charges in a family have you had at a time? All ages. Mostly toddlers recently, though next job is a young baby. Typically there is 1 nanny per child at least, last job was 9 nannies for 4 kids (rota nannies). I have looked after several dozen children at once before. BIG playdates are a thing in the Middle East especially.
Do you ever stay in touch with families after you've moved on? Some but not many. The children are quite young and tend to forget and I feel it would be confusing if I kept popping up. I'm not sure it would benefit them in anyway and as much as I'd love to see them to see how they've grown, I think that'd be more to my gain than theirs.
Do you personally recommend controlled crying for babies under 6 months? Do you try any other methods first or is it a question of doing what your employer tells you? I KNEW the controlled crying question would ruffle feathers. For a start, don't confuse controlled crying with Cry It Out, completely different. I advocate allowing a child to whine (not scream - if they are obviously distressed its completely different) for 5 minutes before going in and soothing them, without picking them up. Continue this until they sleep. If they get distressed, pick them up. Never before 6 weeks, and its dependant on the baby and their temperament as to when to start. This isn't a case of leaving them to scream AT ALL, but instead to allow them to whinge if needed. Obviously everyone here knows the difference between whining and distressed crying. I'd never let a distressed child scream.
I will do what the employer tells me as default unless I strongly disagree - in which case we will discuss it and if I'm still uncomfortable, I guess I'd leave, but its never come to this.
I don't want this to sound as goady as it probably does but what sets you apart from the 'normal' £600 a week nannies to justify you being paid so much? Not goady at all and truthfully - absolutely nothing. But at £600 a week I'd expect the job to be "normal" and to have set hours and for me to have a life outside work. But the skills involved? Same. Except I guess being able to put up with more?
Have you met any adults who were brought up by a constant series of nannies? What do they say about their childhoods and their relationship with their parents? No, not really. But I'm from a "working class" background so most of my peers have had "normal" upbringings.