I like to create sculptures  with my mind and my hands
Great!!  I like to think of sculpture as a 3 dimensional painting.  They are very visual art pieces.
i like how a sculpture takes up space. 
Yes, quite.  A long time ago they would carve wood or stone, or use clay to make a model, but these days there is no limit to the materials which can be used.
my favorite materiel is metal. the gridiron of the metal and the sparks flying everywhere.
I concur.  We still have ancient sculptures that were carved in stone, due to stone's durability, but unfortunately most of the wooden or clay sculptures have long since disintegrated.
but there will always be more to replace them
Yes, we are producing many sculptures in the modern era, but the development of the style of greek art was remarkable, given that it occurred around 750 BC.  Some of the best  figures come from this period.