Aluminum is the second most malleable metal. It's an excellent conductor of electricity and heat, resistant to corrosion and tarnishing, highly reflective, non-combustible, lightweight, and highly recyclable.
If you tend toward chunkier jewelry, aluminum allows you to go bigger and bolder without sacrificing comfort.
It's easy to bend and shape, unlike stiffer metals, and satisfying to hammer and texturize.
It's an underused medium, perhaps because it has an association with crafting rather than artisan jewelry, but it's equally suited to either endeavor for a variety of reasons not the least of which being affordability.
If you're working on prototypes for more expensive wire designs, aluminum allows you to play and make mistakes.
It's a perfect entry wire for beginners. Available in a wide array of gauges, colors, and finishes, that allow for versatility and playful approaches to wire jewelry designs.