Kinda late to (and off) the topic but I will give my 2 cents... I think every actor/actress can play rai roles if they challenge themselves. Korean and Chinese dramas have actors switching back and forth between heroine and villian roles all the time. I always hate how Thais stereotyped their artists, like how a supporting actor can almost never get the leading role despite years of experiences and skills just because he is not pra ek materials.