I've been so lazy about reading sutras. When I was a kid I dismissed many sutras (more properly many parts of sutras) as embellishments of one sort of another (you know those pesky parts that can be dismissed as "cultural embellishments"). Still, I would often find sutras in different places (sometimes even just walking down the street!).
Nonetheless I have often been partial to the Brahma Net Sutra. I'm trying to make headway on the Avatamsaka Sutra. More recently I am drawn to the Tse Do Sutra, one of the Amitayus sutras. When I was a Zen student I memorized the Heart Sutra and still frequently recite it.
I also am very fond of the Pali cannon. In many ways my favorite sutta there is the Ant Hill Sutta although many other suttas are dear to me.
Kirt's Tibetan Translation Notes
"Even if you practice only for an hour a day with faith and inspiration, good qualities will steadily increase. Regular practice makes it easy to transform your mind. From seeing only relative truth, you will eventually reach a profound certainty in the meaning of absolute truth."
Kyabje Dilgo Khyentse Rinpoche.
"Only you can make your mind beautiful."
HH Chetsang Rinpoche