are the graphics really that good?

[Cassie]

You'd probably just have to select a certain Sim and then you are automatically playing that household. As for moodlets, they are just moods that Sims recieve after a certain event. If your Sim gets fired, he will recieve an unhappy moodlet and therefore he'll be upset and mopey and whatnot. And if your Sim has a baby, they'll recieve a happy moodlet and have a spring in their step for a certain period of time.