I lived for half my life in Seattle and souless is not a word I'd ever associated with the place. I guess it'd depends on how you define 'soul'. Considering the size of the city (there are 20 larger cities in the US), I'd say we had more than our fair share of just about everything.Having lived for 17 years in Seattle, I can say it's a soulless place though beautiful. You are still in the recovery stage. Give yourself time...
I can completely sympathize with the OP. 90% of the times I've felt home sick here it's been related to Buenos Aires vs Seattle and not Argentina vs US.