This is a small section of the front facade of Catedral de Barcelona. I could stand out front of this building and stare at the details for hours. Judging by the other people standing here, some did. I'm easily impressed, which is not to say this isn't an amazing work of architecture, it's just that I rarely get a chance to see buildings like this, so when I do I'm usually overwhelmed.
I think that if I see beautiful things often it helps boost my sense of esthetic. That's true about anything, the more we do the better we get, so on and so on. That's why I think public art is vital to a city. When it's always there it strikes a cord, albeit subtle or even unconscious, but vital nonetheless. I just returned from Vancouver where I spent some time downtown. They have a lot of public art on display. I would say the people who see that art have a higher sense of aesthetic whether they realize it or not.
Barcelona has a tonne of public art, everywhere you look. And according to my theory, the residents of that city have a very high aesthetic IQ. That goes for a lot of like minded european cities where art is central. Of course I just stated what any european, and any art lover, already knows; that art is good for us and adds to the vitality of a city. Stating the obvious is just how I roll.