Originally Posted by Soju
... I think THAI is a bit more lenient of going over than the LLCs such as Nok Air or Air Asia, which I'd avoid if at all possible as they only give you 15 kg. I believe and so you'll end up paying much more in overweight charges. Not to mention THAI usually has more flights and is more likely to be on-time or close to it.
I made the mistake of taking AirAsia 2 years ago and besides the late and canceled flights, I had to pay more for my 20KG excess baggage than it cost for myself (80 KG). Never again.