My starting SPECIAL will reflect what I can figure out about the sole survivors background in game adapted to the man I already have planned out in my head from when the game was first announced.
Leon is a former military man, but he seems to be competent in most areas. I think he'd be well rounded but still remember his old days on the frontline. This would make him physically fit and agile but slightly less charismatic and intelligent. Slightly.
With that in mind:
S: 5,
P: 4,
E: 5,
C: 2,
I: 3,
A: 5
L: 4
If he turns out to be in a leadership or technical role then there would be modifications to the Charisma and Intelligence respectively. I think he's just a standard grunt though. And with his well rounded stats I hope for him to be molded by the experiences of the wasteland into whatever he decides is best. Currently I have it in my head that he'll be focused around societies and rebuilding, to tie into the settlement building features. Might be some development into Charisma once he feels to need to rebuild old Sanctuary Hills into a mighty bastion of civilization.