I really have enjoyed reading through this thread, it seems to me that the contented folks on here have the strong bonds of friendship and family to fall back on and the general air is that the Argentinians are a warm people. I suppose I can understand that in comparison to London, where I have lived for seven years, life in Buenos Aires might seem a tad monocultural. There is a common theme that maybe the food there is not particularly varied and I can certainly attest to the massive variety of high quality food here.....if you know where to find it.
I will say this though, for those who have any experience of London as a city that they moved to, it is so, so hard to make friends. I believe after all this time, I have two and one of those is from my home area. The other is an Australian that is thinking of going home. Unless you have family here, London is a lonely place. It can show you a good time but it will never love you back. Materially, I have not struggled in London, I have endured the harshness enough to become established and to do quite well for myself, I could not argue against it as a great place to advance your career. For access to culture where better could you be? But But But.....it is such a cold place.
I stayed in Buenos Aires such a short time and I am careful not to even pretend to know it, however, I have a comfortably life in one of the "best cities in the world" and, the lack of warmth I have experienced here is not compensated by anything material. It seems that BsAs may be eccentrically organised, might be frustrating in very many ways, may have boring food and any number of complaint worthy failings, but is seems friendly and warm and there is a sense that if you make an effort, you might be embraced. That is something that is WORTH something.