My favorite game with Portenos is to ask two or three which is the best pizza- and watch the ensuing two hour argument.
Me, I like different kinds of pizza- just as I will amiably drink Kentucky Bourbon, Irish Whiskey, and Single Malt Scotch.
And no, the pizza in BsAs is not the same as Chicago deep dish, or a quattro stagione at Baffeto in Piazza Navona in Rome- but I think there is some great pizza here. I have never eaten a Papa Murphy's pizza, so I have no idea if its as good, or bad, as that.
my favorites are-
A La Piedra- Io Te Amasso, on Malabia, between Palermo Soho and Barrio Norte. Good salads, too.
or there is a trendy place just off Santa Fe, down by Callao, that has fancy martinis and a really good thin crust basil and sun dried tomato pizza- cant remember the name.
But the classics are great, in my opinion.
I love Guerrin, and Los Immortales, and El Cuartito and Los Cuartetas and El Palacio- the atmosphere, the people, the going back in time that a night out on Corrientes offers, a chop and a fugazzetta- man, I am in heaven.
I recently got taken to La Mezzetta (by a taxi driver, no less) and I was totally digging the upside down cooked Fugazzeta- probably the best I ever had- straight cholesterol laced Heroin, to me.
And Punto y Banca, on Honduras- to me, thats exactly what pizza should be.
Like everything else about Buenos Aires, if you go with preconceptions that its not like Italy, or New Jersey, or Chicago- well, of course, you will have a self fulfilling prophecy.
Eat local, Eat whats here, appreciate it for what it IS, not what it aint, and there is plenty of good pizza here.
Take some of Layne Mosler's advice- eat where the taxista's eat-
http://www.taxigourmet.com/
she has reviews of Punto y Banca, La Mezzetta, and lots more.