Very interesting, gingernut, and very thought-provoking.
I've never been lower than 145/90 since I was in my early twenties, so that's 'my' BP. I do counter it with mild aerobics and mild weights at the gym every morning plus I've never smoked and I drink very much in moderation.
On beta-blockers my BP is around 135/80 these days, so no problems there.
But just to show how misleading all of this can be: my wife has a resting heart rate of around 60 and a usual BP of maybe 120/60. So she turns up at an MD who doesn't know her, he checks her BP, it's 135/80 and he says "you're fine". She replies, "no, that's high for me !" and he smiles indulgently.....
There isn't a DIN standard human being, is there....