its not just Angkor that's amazing, check out the Old Markets and the wonderfully friendly shopowners, Shop no 35 especially! Me and friend came back a second time and she offered us a great Siem Reap snack that is so tastefully sweet we just got to grab a few pieces to bring home.
Also, go around in the Tuk-tuks rather than the mini vans or cars, that way you could see the sights first hand and feel the breeze (and dust! hahah).
Oh and when you just want to chill and see the world go by, sit by the verandah on the ground floor or get a seat next to the balcony at the great, Grand Cafe. The profiterolles were great and so is the fresh orange juice!