One thing I find interesting about the foreign perspective on Thai food is considered quite vegan/vegetarian-friendly in the West, but unless it's the recently-finished Chinese Vegetarian festival (เทศกาลกินเจ), it's a bit difficult to get food for those with that sort of diet. Meat, particularly pork, is the default for everything and asking for a meatless main does not get you extra vegetables or a lower price, just less food. The fish and oyster sauces are easy to forget and are in everything. Heck, you don't get table salt to adjust your dish but fish sauce + birdseye chilies (พริกน้ำปลา).