Best Potluck Food?

What would be the best potluck food to bring?

We're talking about a potluck that's above simple party snacks such as soda and chips. Cake is acceptable as long as it's not just "bread" with frosting on top. You get the idea.

Also, there's no particular theme to address. It's free-for-all in this particular area.

Anything with barbecue is usually an instant-win there.

Bring a 73 pound steak.

Kidding kidding. Uhm Maybe a large salad bag. Healthy, enjoyable, nice side dish.