Green papaya salad is the most popular dish among women in Thailand according to a survey I heard on TV there. It is a Northeastern food that is eaten with sticky rice and other Northeastern dishes such as laab, beef salad and bamboo shoot salad.
The two most popular types of green papaya salad have either dried shrimp or salted crab. Green papaya salad with dried shrimp and peanuts is called som tum thai. The green papaya salad with salted crab is called som tum pbooh. The majority of the ingredients are the same. My mother likes it with both dried shrimp and salted crab.