I lived in Buenos Aires in 2018 and I loved it. I highly recommend living/staying in the Palermo SoHo neighborhood. It’s full of energy, life, excellent cafes, co-working spaces, pubs, nightlife, etc. Also Palermo has the lakes and incredible rose gardens for hiking and enjoying Yerba mate. I also recommend hiking at the ecological reserve “reserva ecológica” The public underground metro called SUBTE is very efficient. The city has been adding bike paths. The locals were very friendly, outgoing, and easy to meet. They seemed interested in meeting people from other countries. I recommend trying to speak Spanish and they appreciate the effort. The women are also gorgeous and friendly to foreigners. Inflation is really making it hard for local people. Also as with most major cities, keep your cell phone and wallet in your front pocket and don’t be flashy with new iPhones. Using basic street smarts and simply staying alert at night, I had no issues. The Palermo and Belgrano neighborhoods seemed to be the safest and most relaxed. Make sure you try local foods, drink Yerba Mate with locals, take a weekend trip via a short train ride to “Tigre” where you can rent an affordable cabin and spend the weekend on the water, kayaking, fishing, drinking mate, etc. Argentina is really nice! Enjoy!