Considering Sjoerd Solution on displaying multiple 2D plots in 3D :
myDisk[{x_, y_, z_}, r_] :=
Polygon@Table[
{x, y, z} + r {Cos[\[Phi]], Sin[\[Phi]], 0} // N,
{\[Phi], 0, 2 \[Pi], 2 \[Pi]/200}
]
Graphics3D[
{
EdgeForm[],
{
Red,
myDisk[{1, 1, 0.5}, 0.5],
myDisk[{0, 0, 0.5}, 0.5],
myDisk[{-1, -1, 0.5}, 0.5]
},
{
Blue,
myDisk[{1, -1, -0.5}, 0.5],
myDisk[{0, 0, -0.5}, -0.5],
myDisk[{-1, 1, -0.5}, 0.5]}
}
]
Using ViewPoint I get :

Whereas I would like to systematically see :

Any Idea ?
A combination of
ViewVertical -> {0, 1, 0}, andViewPoint -> Top?