Hi!
In Buenos Aires you can go:

- La Boca , Caminito and La Bombonera

Obelisco

- Puerto Madero

- Recoleta

- Floris Generica

- Palermo

- San Telmo

- Plaza de Mayo and Cabildo

- Buenos Aires Metropolitan Cathedral

- Tango Show:

http://www.trippy.com/question/Buenos-Aires-Good---34-Tango-show--34--in-Buenos-Aires

Café Tortoni

- Teatro Colón

- Jardín Japonés

Tigre

Good trip!

Damian.

There are so many "good" places to eat in BA....El Obrero (bodegón in la boca, at lunch), El Puentecito(bodegón in barrancas, at lunch), Sarkis (excelente restaurante arabe en Villa Crespo, for diner), El Pobre Luis (parrilla in Belgrano for diner), La Esquina de Rojas(sándwich parrilla in belgrano, lunch).....buen provecho!

Places to eat: 

Cabaña Las Lilas

Café Tortoni

Things to see:

Flea Market in San Telmo

Madero Tango dinner and tango show

Obelisco

La Bombonera and La Boca

If you have time, spend a few days in the country side at Estancia Villa Maria riding horses, eating good food, relaxing, etc.

Related question pages on Quora:

1. What are the best things to do in Buenos Aires?
2. What are the best free things to do in Buenos Aires?
   
3. One week in Buenos Aires - what should I do?
   

Hi Chris! Some months ago I wrote about places in Buenos Aires in Spanish... It is an amazing city! >> wp.me/p51NqY-2P

Hope you enjoy it!

Cheers,

Camila