Porteños: Polite people?

Sometimes, Porteños might look like very educated and hard-working people but...is this really true?
Imagine a world where bus drivers explain to you in the kindest way how to get somewhere or underground ticket sellers grinning at you while you charge your SUBE card. That's something that I swear I can't even try to do it.
Everybody is supposed to be polite and kind, that's perfectly understandable. However, when you receive this kind of reaction from almost every person you see a day, your politeness becomes sourer and sourer, taking practically no notice of it.
So, are the Argentines trying to pretend they are correct people when they aren't? I believe that there are two different types of people: the ones who pretend because they know they shouldn't be rude, and the ones who don't care at all about that. Of course, there are some exceptions: I could mention a third group, but it is so small that I'm not going to talk about them, you know, in order to follow my pessimistic style.
In my opinion, it's preferable people pretending to be polite instead of people shouting or being rude for nothing. This doesn't mean I expect to receive hypocrisy, but I'm trying to express what I feel less rude.
If everybody let our feelings go out with no reservation, we all would be like in a mental home, acting like crazy people or wild animals. Now, since this time I don't want to give a boring conclusion, it's time for me to ask you: which kind of person do you prefer meeting?

Sorry, maybe you can notice that my writing quality is getting poorer. Keep in mind that I only have time to write my blog entries while I work, so I can't pay full attention to this. In fact, this topic is starting to bore me.