The VF-1, how realisitic it seemed, more realistic than the Transformers which they used a little too much anime magic for the proportions, that I discovered soon as a kid.
The VF-1 and all other Macross mecha (alas, apart from Macross 7) had no mouths and that counted for the 'realism', they didn't need to talk and were not organic, so mouths and lips are just dumb.
Oh, and the Regult! First time I saw it as a kid I was genuinly frightened. These were real alien 'beings', much different from the humanshaped mecha from Earth.