I agree with Sergio. I don't like to be negative, especially where people don't even know me, but I've lived in BsAs for 5 years, 4 of those with an Argentine. And my perception is they are not a happy people--and that's where the tango comes from.
Because of one corrupt and ineffective government after another, they have no hope for the future, no hope that times will change for the better, no hope that sacrificing for a good education will change their lives at all. Here at the ends of the earth, they feel alienated from the rest of world, so very far from the Europe they still think of as "home." So they have become fixated on being happy "now!" They sacrifice to have plastic surgery, they exhaust themselves in gyms, appearance is everything--and that includes material goods. And in Argentina, everything is so expensive.
This is not a criticism; I would be exactly the same if I had grown up here.
My Argentine is a naturally cheerful person, even though he's lived at the poverty level all of his life. He had to quit school in the 4th grade to cut sugarcane in the fields of Tucuman. But how can anyone be happy when they can't pay the light bill, or their kids have to survive on mate and sugar?
Happiness is for those with full stomachs, a roof over their heads, and electricity. For the rest, "happiness" is survival.