Cover designs, color, something on the cover (usually a picture) that leaves me thinking, "what's inside this book?"

Like if I saw a cover that had a little girl standing in the middle of a busy highway looking back over her shoulder, I would probably pick the book up to see what was inside. Did her Mom just leave her? Was she abandoned? What? SEE?

If a cover is busy all over, I'll pass it buy. If it is overpriced in my mind, I won't take it off the shelf.