Present the top few apps (representative of the content of the store, I assume), and then give them the option of taking a quiz about their interests which will

Present the top few apps (representative of the content of the store, I assume), and then give them the option of taking a quiz about their interests which will give them a more specific list which they might be interested in? Not that good if the goal is to get them to go through the entire store, but workable if you just want to give them an idea of the contents and increase the chance of them buying other apps.