Girlz, Koh Samui is a beautiful island, weather's super hot. Me now super tanned and sun burnt! We rented a jeep, explored the island on Day 1, went waterfall climbing. Day 2 lazed by the nice white sandy beach, and there's when I got burnt. Day 3 and 4 went to Koh Tao, Koh Nangyuan and Angthong Marine park for snorkelling, kayaking and cave climbling. Day 5, rented a motorbike and went around again. Fun!
You have to be adventurous and explore the island. Waterfall and cave climbing is quite tedious. And you have to love the sun, beach and sand to enjoy Koh Samui to the fullest. Oh, and there's night shopping and lots of pubs.