I gotta go with the VF-1A Valkyrie because it resembled the F-14A Tomcat. Back in the 1970s and 1980s, anything that resembled the F-14, 15, 16, and 18 teen American series fighters was cool in my book.
Gobots. lol. What I found disturbing about the Gobots is that they had mouths like humans when they spoke and their arms and hands looked funky as hell.
This guy's right hand is weirding me out in that youtube video. He looks handicap or must have suffered a stroke of some sort.
Anyway, back to the Mazinger Z. That thing is awesome.