OK, just wanted to share it with all of you. Buenos Aires totally absolutely positively rocks! I love it!!! (I am in B.A. right now) Anyone who loves big cities full of energy should absolutely go here ASAP!
It is indeed a beautiful European city. It is not a Latin American city. Great opera and Ballet in BA and excellent restaurants if you enjoy eating dinner at 10pm and then go out Tangoing. Best steak in the world and the pasta is second to none as are their wines.
Argentina is indeed amazing. Buenos Aires is just so full of energy, so lively, so colorful - Wow! We also went to Montevideo, and the contrast was amazing - the latter is a gorgeous city, but the energy of Buenos Aires is just not there. And the climate down there isn't too bad either (compared to Boston at least...). So overall - awesome!