These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Shin Mazinger
Crazy Awesome: Let's just go with the easy route and say everything, but, beyond anything, Juzo Kabuto.
Crowning Moment of Funny: Baron Ashura geeks out over the Pilder in a manner that would make him seem like the second coming of Ryusei Date and even tries to dock it into Mazinger. He crashes it into the side of its head instead.
Boss, Mucha, and Nuke have since played soccer with Count Brocken's head. And it was glorious.
As said in an imageboard: Brocken ball! The game where everyone wins, except the ball. Which is Brocken.
Kanjite Knight, the first opening, deserves special mention.
Fan Nickname: "Shin Mazinger Z" is never used by the series, but fans use it to distinguish the Shin version of the mech from the original.
Fridge Logic: Kouji and Shiro's parent's first met ten years before the beginning of the show. So... How can they possibly be their parents?
They left Bardos Island 10 years ago. The expedition started some years before, as did their first meeting.
That still doesn't explain how Kouji is their son. Even if he was born during the super long seven year expedition that the previous troper is implying, why wasn't he with them when he escaped? Was he sent back to Atami before it was over? Who the hell would be watching him then? Dr. Yumi? The Kurogane House?
Also they escaped Bardos with just Juzo and Tsubasa, and despite her not showing any signs of pregnancy, when Stroheim found her she was with Shiro so ... what, did she not tell Stroheim she was back for 7 to 9 months until he was born?
Internet Backdraft: When the first episode aired there were lots of reviews that utterly trashed it. Regardless of your opinion on the episode, bringing this up in certain areas of the internet is an excellent way to start a Flame War.
Magnificent Bastard: Tsubasa's turning into quite the ingenious schemer. We're lucky she's on Kouji's side.
Memetic Mutation: It's name is. It's name is. It's name is. It's name is. It's name is. It's name is. (Ad infinitum)
SUPER ASHURA, due to his/her fight with Mazinger Z in episode 3, putting him on the same level as MasterSUPER ASIA.
Most Wonderful Sound: For this Troper its the sound which Mazinger makes when Pilder docks and Mazinger's eyes lit up. Its the sound that proclaims incoming Badassness and ass whooping.
Values Dissonance: The duel between Kabuto and Lorelai simply must go through because of the wishes of their fathers. Despite their own wishes, they are forced to battle—thankfully, it's played for the tragedy of it all.
The Woobie: Baron Ashura. Sure, it's a weird hermaphrodite, but it's like the whole show is against him/her! Of course, he/she gets the last laugh.