Pleasure seems to be a fundamental consideration in Indian aesthetics, hinging on the concept of rasa:
Ragini Madhu Madhavi. Ragamala painting (possible source for Paul Klee’s Abenteuer eines Fräuleins).
rasa, ( Sanskrit:: “essence,” “taste,” or “flavour,” literally, “sap” or “juice”) in Sanskrit literature, the concept of aesthetic flavour, or an essential element of any work of art that can only be suggested, not described. It is a kind of contemplative abstraction in which the inwardness of human feelings suffuses the surrounding world of embodied forms.
............and more broadly, I love these 2 words:
"Ornament is, to coin a word, exclusively calliphoric; it carries beauty with it."
and
terpnopoietic: "providing pleasure"
delightful neologisms that come from...
OLEG GRABAR
"Oleg Grabar... a historian of Islamic art and architecture whose imposingly broad range and analytical subtlety helped transform the Western study of Islamic culture..." (NYT Obit) 
"Why is it that even a cursory consideration of the nature of certain designs that are neither entirely mimetic nor nonmimetic and of theories of ornament and decoration could lead us to consider such weighty issues of esthetic and moral philosophy? It is perhaps true, as Ruskin or Le Corbusier's anonymous teacher, among others, would have suggested, that to deal with whatever ornament may be strikes at the very core of the visual experience, where that experience is not skewed by taste, snobbery, ideology, social convention, ecclesiastical or political restrictions, stylistic salesmanship, and all sorts of other refinements that limit the emotional and sensory freedom of each viewer. If so, artistic traditions, like the one issued from the unique conditions of medieval Islamic history, like the worlds from which come the Irish manuscripts of the sixth century, Inca sculpture, or ancient Chinese bronzes, are all traditions that avoid the straitjacket of copying nature or else transfigure visual and imaginary experience into other types of forms. By doing so, they lead most powerfully and most directly to the very root of our need for pleasure through our eyes. Clearly there is a process of ordering visual experience, as was indeed well seen by Gombrich, that is independent from the cultural forms it has taken. To call this process ornament or decoration is not appropriate, for ornament itself can be the message that is communicated..." - Oleg Grabar
Princeton's review of it:
"In this richly illustrated book, Oleg Grabar shares a veteran art historian's love for the sheer sensuality of ornamentation. Grabar analyzes early and medieval Islamic objects and uses this art to show how ornament in general enables a direct, immediate encounter between viewers and art objects from any culture and time period."
Ottoman Calligraphy:
Some textiles from Safavid Iran:
and finally (somewhat relatedly) I love this unusual quote from Matisse, about "arranging" expression:
MATISSE

“What I am after, above all, is
expression…. Expression, for
me, does not reside in passions
glowing in a human face or
manifested by violent
movement. The entire
arrangement of my picture is
expressive: the place occupied
by the figures, the empty spaces
around them, the proportions,
everything has its share.
Composition is the art of
arranging in a decorative
manner the diverse elements at
the painter's command to
express his feelings” (Matisse).
