physicality
balance
viewers relationship to the object and space that they both occupy
space as it exists, imagined and experienced
mirrors structures around it
interestingly i came across this artist after just handing in an essay, in which i looked at the idea of 'art and objecthood' where factors of size, shape, space , the object and the viewer are all discussed.
http://watersideprojectspace.org/artists/ben-washington/ben-washington-works.html