I have been to koh samet....But I stayed near Hat Sai Kaew beach, just right beside Nadan Pier. Yup you got it, it's the sunrise villa. Highly recommend it. Had tons of fun here and went squid fishing with the locals.
It depends on what you want when you choose your location to stay. It's a small island and all the beaches are within few km distance. If you want atas location, Ao Vong Duan is for you. Many atas ang moh stay here because they have a nice beach that are not crowded.
Hat Sai Kaew beach is the most crowded one as it is near to the main pier where tons of accommodations are. But the fire show at night is very nice (Ploy talay restaurant). This area has many nice eats, restaurant or street food.
Do you like sunrise and sunset? koh samet has the best view of it!