Aside from pad thai, I'd have to say panang curry is my second favorite item to order when I get Thai take out. The warm coconut curry broth is luscious and velvety and packed with flavor and paired with warm, sweet Jasmine rice, its just about the best comfort food you could ask for.
Now it might seem like curry would be difficult to make, but its truly one of the quickest dishes to throw together as long as you stock all the ingredients regularly in your pantry. To key to curry: its ALL IN THE curry paste. This is pivotal to the flavor of your curry. Some brands I recommend: Mae Ploy, Maesri an Try My Thai. You can find the first two online or your local Asian market.