One of the biggest complaints I had about Thailand is that the beer is shit. All the Thai beers are garbage. Singh tastes like Soapy dishwater. Leo is a weird hangover inducing brew. Chang has no head no flavor. In Thailand Heineken is the "premium" domestic brewed foreign beer and i've never liked Heineken..bitter and characterless taste.
My favorites are Hoegaarden. This beer is great paired with food like pasta or steak. I've converted non beer drinkers to beer drinkers with this beer.

The U.S. craft bears..samuel adams etc.. are mostly all decent too. Currently i'm drinking some Mendocino brew from Costco. It's tasty.

In Laos their national beer "Beer Lao" is actually pretty decent as a daily sipper. They have a dark lager version and it's also good.