Mismatched vintage plates. This general style: Victorian, floral, elegant. I'm collecting a set of 180, which will be on the tables at the start of the reception. They will then be cleared and used for the dessert course: pie!
Pick a theme and play with it. Grouping similar plates in a variety of sizes makes for an eye-catching montage. Or, if you have plates of different colors and designs, pick similar-size ones to hang together for a more ordered but visually interesting look.