Rustic wood is also a good option
While modern furniture can give your home a clean and polished look, there is a certain charm in going for a rustic aesthetic. Honestly, furniture pieces that use tree trunks, rocks, or twigs give off a cozy homelike vibe that other styles just fail to achieve. And these pieces are easier to match together, like in the picture below.
While all these pieces are made from different types of wood, and they are all very unique in their own way, there is aesthetic coherence. This means that you can build one-of-a-kind pieces like these, and they will look great even if they are not exactly the same. So, you should take rustic wood into account to make racks and shelves.