Here are some quotes from Wiki about and by Alex Katz.
His paintings are defined by their flatness of color and form, their economy of line, and their cool but seductive emotional detachment."I wanted to make an environmental landscape, where you were IN it."
His portraits always feel so bland. They give away nothing. With his landscapes you do feel you are in them...He completes a really big painting in a day! Well...he did. He's in his late 80's now so maybe he's not working this way now.