BA is a really enormous city and as such the areas are quite distinctive. The main ones are:
Microcenter (where we stayed the first three nights) – this is typical of any heart of a city – busy, jam-packed and a bit grubby.
San Telmo & La Boca – south of the centre, hippie areas with lots of character. They’re known for their antique stores, tango and big weekend markets. Some parts of La Boca are dangerous though.
Retiro, Recoleta & Palermo – north of the centre and are home to the upscale museums, shops and eateries. We stayed in Palermo the last 2 nights and enjoyed the clean leafy streets. It’s the Claremont of Perth.
We walked everywhere and a bunch of the sights we visited are listed below. It made me smile every day because the sun is shining and it’s HOT (above 30C each day). Plus the Jacaranda trees all over the city are blooming and shower the streets with their flowers.

