Steel has many different characters. It can be modern and industrial but also delicate, decorative, whimsical, rustic and vintage. It is the most widely and easily recycled material, and there is very little produced today that doesn't have a large component of reused metal.
I first started using steel in my projects when I was introduced to welding by my neighbor, Mark Castator. Mark went on to become a successful metal artist (http://www.markcastator.com/) and I still love using steel in my projects.