Ah Samui! I lived here for 8 months and it was pretty cool. A lot of people think Samui is too commercialised now, but I disagree. It has a pretty laid back feeling to it still.
Moped that you have hired for 2000b a month and dont even need to wear a helmet. A lot of people tell me that drink driving rules do not apply in Samui either – although I fell off 3 times, so I would not recommend it! This i smy bike that I ended up buying for 15,000b and sold it about 8 months laster for the same price – so all in all not a bad deal!