Vegas "LOS" question
shamu613 has some good recs. Love the prawns ocha. Drunken noodles w/chicken are great.
One of my favorite things that I've ever had is the softshell crab salad (special). Amazing. The Nam Ka Tod is another oft recommended dish. We love it (crispy rice mixed with minced sour sausage, green onion, fresh chili, ginger, peanuts, and lime juice). They also have amazing coconut ice cream and amazing sticky rice for dessert.
As LVI said too, they are great at giving help/recommendations.
Here's a list I've compiled from others recommendations and my own personal experiences dining there.
Tom Kah Kai (Bangkok Style Soup)
somtom sea bass, a green papaya salad with huge chunks of sea bass, along with red grapes, matchsticks of green apple, and perfectly ripe cherry tomatoes.
shrimp curry with cognac sauce (regular special)
drunken noodles with chicken
Hoh mok plar is one of my favorite dishes at LOS -- pieces of catfish with egg, cabbage, with a judicious amount of coconut milk and curry.
kang hung lay (northern pork stew)
There are actually two different pork dishes on the nothern menu - the Kang Hun Lay is meat without vegetables, in a curry with some Burmese/Indian overtones that has a hint of sweetness, some of that coming from roasted garlic (you will usually find several whole cloves per order). The other is Kang Hoh, which relies more on dry spice, but does have glass noodles and some other vegetables with it.
House special crispy garlic shrimp. It is not on the menu so you have to ask for it. They take prawns peel the shells but still keep them on. Cover in coarsely chopped garlic and fried up. The shells get so crispy that they are like really thin potato chips.
Seared Scallops with Red Curry (the sweetness of fresh scallops and the hottest of their curries plays so well together; there is usually a slight touch of cognac to balance this out, similar to their Salmon Panang).
There are many on this board that have been going to LOS longer than I have and have a far more experience than me. But I will say, without any hesitation, that one of the better ways to go to LOS is to not even read the menu and ask them to prepare a meal for you and your guests. Giving them guidelines will tailor the experience to your tastes. But you are in Las Vegas after all and if you have no dietary restrictions, take a gamble and let them cook for you. My only advice, if you were to take this route, is to give them a $ amount you are comfortable with and not to order the lobster (it is VERY GOOD but it is expensive. And given how cheap lobster is, historical lows, restaurants still MP their lobster and take full advantage of us diners.). I would also have them pair wine for you also. Some of the Rieslings and other German/Alsace combos truly make this one of my favorite dinning experiences anywhere.