Going back to the earlier points, I don't see why he'd want to go back and play county cricket. Will he ever get the same buzz as he did with England, has he got anything else to achieve that would compare with what he's done?
I don't buy that, not at any price. It's called form for a reason, he's been out of it for two years yet suddenly on the immediate back of the KP test affair he jacks it ALL in and Flower is round sniffing around KP to get him back.
It may be a long culmination of form and other factors, maybe even for his family, but that KP affair played its part, of that I have no doubt whatsoever - and I rarely commit fully to a view like that.
He could have gone back to the county circuit, but he'd know KP had "won". I doubt he took the decision lightly, I doubt KP wouldn't have been among his thoughts when making it.
And who knows exactly what has been said behind the scenes, he must certainly have discussed various issues with the selectors and Flower, I doubt very much he'd have liked some of the things said. I could even see a scenario where he said he wouldn't have KP back under any circumstances, and was told in no uncertain terms that KP was likely to be called up sooner or later. If someone's authority were undermined, their form not great and they got very angry about it, the likeliest course of action would be something like quitting.
There is plenty England haven't achieved, probably no cricketer dead or alive has achieved everything there is to achieve. Has Strauss...........
Won the World Cup?
Won all possible titles with Middlesex?
Won in India with England?
Scored hundreds against all counties?
Scored hundreds against all Test nations?
Scored a triple hundred?
I could continue, there is no such thing as "achieved everything there is to achieve" unless you partake in an activity where there isn't a great deal to achieve. There are way too many stations sitting in middle ground that Strauss could have got off at, simply stepping down as captain and finding form at Middlesex being the obvious one, retiring from Internationals is another.
More to it than we know, of that I can have zero doubt. He may come to regret quitting cricket, he may even do a KP and reverse it quickly (if he has any sense) He could take a year out, of course his more pressing family issue may well be what he will do when he is too old to make a living from playing cricket..................................