Fifteen years ago Chang was my hands down favorite. I left for years and returned to find it replaced by Chang Classic and its flavour and kick (ethanol) were gone.
Leo has a bit more flavor than Singha. It was Leo for a few years but I gained 10 kg. It has lots of calories because of the cassava flour in the ingredients.
I'm left with Beer Sing, and hoping the new liquor act will allow a few competitors.