Otres was great... very chilled. Was a while ago.
I have a friend that lives in Kampot... quite a nice little scene going on there, not sure about beaches but it is by the coast. Famous for it's pepper though.
Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming "Wow! What a Ride!"