For me:

Singha - metalic taste and makes me feel exhausted the next day 6/10

Leo - reminds me of British lager, in other words weak and gassy. It seems to be the choice of many long-term expats. 3/10

Heineken - was my preferred choice but I have now discovered something better. 8/10

Chang - road to ruin and a kii nok's preferred choice. Drink it warm if you need to purge your stomach. 2/10

Chang draft in bottles - Have you tried this? I feel the quality is better than Heineken and strength about the same. Absolutely no after effects the next day. I feel hornier than ever. Plus it's as cheap as normal Chang. 10/10

What do you drink?