Autumn, the year's last, loveliest smile. William Cullen Bryant
I cannot endure to waste anything as precious as autumn sunshine by staying in the house. So I spend almost all the daylight hours in the open air. Nathaniel Hawthorne
Every leaf speaks bliss to me, fluttering from the autumn tree. Emily Bronte
Winter is an etching, spring a watercolor, summer an oil painting and autumn a mosaic of them all. Stanley Horowitz
Neither spring nor summer beauty hath such grace as I have seen in one autumnal face. John Donne
To end on a funny one...
Fall is my favorite season in Los Angeles, watching the birds change color and fall from the trees." David Letterman