What's your biggest LaD regrets? Mine is lack of Ambient Occlusion in recent games

Like it kinda pisses me off that the game with such nice models, textures, environments and such most of the times can look so flat because little things cast no shadows. Also, most of the times lighting doesn't even work properly and objects cast shadows the wrong way. And even when the shadows do exists, there are no no half shadows/umbra/penumbra, so the objects in the shadows tend to look flat.