You can find all your products marked as favorites in the My Products under a new page called Favorites.
In the left navigation menu of your Dashboard, just click on Account, then on My Products and there you have Favorites (see image above).
Keep in mind: If a product is deleted from the Favorites page, it will be unmarked as a favorite on the Product Catalog too. And, this applies vice-versa too, if the product is unmarked as a favorite on the Product Catalog it will be removed from the Favorites page.