Without knowing your friends' taste in books or hobbies it is hard to recommend anything.
Me, I like wine, tea, cats, Murder Mysteries, travel, food, chocolate, the cottage, ocean, beaches, kayaking, camping and more.
If I was making one for me, I think I would have to incorporate a wine bottle, wine glass tipped over (the cats) with some red wine staining. book spines either with the names of favourite authors or wine regions of the world. Wine charms would be cute too.