I've never heard of anyone seeing it. Have you seen it in all of its perfectly formed non distorted glory?
No, as it is only visible from extreme south latitudes, and then never in its entirety at any particular instant.
Except gravity it does not work that way...
Charge does not effect gravity.
the idea of gravity acting like two charged plates is not valid because gravity and electricity behave completely differently!!
Actually, the equations which describe Newtonian gravitation and the Coulomb force have identical form, the only differences being the magnitude of the constant term and that one is dependent on mass, the other charge. A comparison between gravitational and electric fields is, in this sense, perfectly justified.
Just by the nature of gravity it tends to form things in globs.
Squares, and flat surfaces tend to be man made.
If you observe asteroids or planets or star groupings or any grouping of mass in the universe you do not see Square, or flat things out there.
If there was cubed or rectangular or flat objects they would not have a uniform gravitational fields. Only spheres or globs can!
We experience a uniform gravitational field because our planet, the mass which is the source of the field it essentially spherical!
What you are saying is valid for objects of finite extent. However, if - as some hypothesise - the Earth is flat and infinite, it would generate a uniform gravitational field.