Two things I learned in Buenos Aires: how to dance tango like a professional (just watching :)), and how to make coffee with a French press, courtesy of YouTube :)) the apartment that we rented only had a French press, so of course I had to learn somewhere how to use it!
The city feels like a poorer version of Paris but I found the people very similar to Parisians. We even ended in the middle of a street demonstration! It feels just like home! Other than that it is a big city with nice architecture and a good transition into Argentina, from the cold streets of busy New York...
JN