> I have to now really think who does NOT own an Apple Watch out of the people i know.
I've never seen an Apple Watch, or any other wearable except fitness devices like the Fitbit.
> It very accurately monitors my calorie burn throughout the day
Are you a professional athlete or morbidly obese? Why do you need your calorie burn constantly monitored?
> i use it to pay for things in shops
I find cash convenient or a card if I don't have enough on me, neither will ever run out of battery when I need them. Anyone I've seen paying by phone takes longer than I do to pay by cash.
> it makes using the underground in London easier and safer (no getting wallet out in congested areas)
You have a bit of obvious expensive electronics on your arm. Are you sure that makes you safer?
> is handy for taking calls in situations where using your phone would be akward, ie whilst cooking.
If you absolutely can't pick up the phone then don't. That's what the answering service was invented for.
> I like being able to skip tracks without having to get my iPhone out of my pocket when walking and my next calendar appointment on the watch face is a handy reminder.
Oh the effort required to get my phone out of my pocket, one of these days it'll give me a hernia. Oh you know, not.
> Add to this its watching my heart rate in the background now and will let me know if something irregular is happening
Have you suffered a heart attack, have a congenital defect or arrhythmia or are in imminent risk of a heart attack? If not why do you need your heart rate constantly monitored?