Reason for focusing on metal

The reason why I decided to focus on metal is because for both of my projects metal is involved. 

The texturing in maya for 3D and for the concept art  for 2D.

I would like to try and mix two materials materials one being a rare earth metal and possibly wood or stone which I can already draw and paint comfortably. I think this would be very interesting for my main project (environment one) to create a fictional material using the characteristics of real materials combined.