from a Canadian perspective, i'd have to say So Cal, albeit I've been staying there more than Nor Cal.
So Cal is just so diverse and people from all walks of life, it seems, are very nice. Traffic sucks yeah, but hey, its so cal, if nor cal were better, there would be more people there. I find it funny how in LA every car u see on the freeway is one person per car. No one car pools, lol. In Canada, almost everyone has at least like 2 people in the car. Everytime we go somewhere in LA everyone drives they're own car, but in Canada someone hauls everyone.