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.
Germans Love David Hasselhoff: Australians make up a large fanbase, partly due to being one of the few countries outside Japan that got the 1982 series.
I Want My Jet Pack: Despite nuclear energy being utilized rapidly for civilian purposes today, as Tezuka hoped, we're nowhere nearing jetpack stage.
The Woobie: Astro, during the retelling of his origin in the Scara arc.
Astro Boy (1963 TV series)
Woolseyism: The original title theme was instrumental. When NBC dubbed the show for their English audience, lyrics were added, sung by a children's chorus.
Astro Boy (1982 TV series)
Macekre: The English dub is abysmal, with the dialogue sounding like it was made up on the spot by the voice actors.
Big Lipped Alligator Moment: The attack of the giant alien at the end whose only purpose was to give a shirtless Astro an action shot, probably.
Crowning Music of Awesome: The title theme (played in variation the first time Astro flies, over the end credits, and a few other times) is truly gorgeous.
Genre Savvy: The Mook who runs away just before President Stone gets integrated into the Peacekeeper