Answer
When dining with locals, it's customary to wait for the host to begin the meal before you start eating. This shows respect for the person who prepared the food.
• Using your right hand for eating and passing food is important, as the left hand is considered less clean in Thai culture. If you're offered food, it's polite to accept it graciously, even if you're not particularly hungry.
• Lastly, if you're served a dish you enjoy, expressing your appreciation can go a long way. A simple 'aroi' (delicious) can brighten the meal for everyone involved!
Practical Chiang Mai planning note: Choose by location, dietary needs, hygiene, atmosphere and the time you plan to visit rather than relying on a single "best" list. Menus, opening days and stall locations change, especially at markets and seasonal venues.