When I was in college, I had a collection of snowglobes but they just kind of sat on a shelf and got dusty. I never took the time to display them in a cool way. If I had, I might have had more desire to keep them. Displaying a collection can take the place of trying to find a perfect piece of art for your wall and also help you appreciate your collection that much more.
Even a temporary collection such as jars of preserved fruit, canned goods or wine can become an interesting focal point in a kitchen or dining room if you creatively display them.