Very intersting indeed!
Personally I like the first one the most from an artistic standpoint.
The third one have perfect spaceships surfces, but they are the same scaled down for the mind and the same effect may be obtained also with an AR sketchy one by duplication and reducing on a layer with the transform feature. I just hope that we will soon have the possibility to modify anisothropically the trasform all the four sides of square defining the objects being tranformed for a fast, intuitively made different perspective simulation.
Panta rei (everything flows)!