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.
As always, kids were the target audience, but the Bishōnen main characters attracted women older than that. Realizing this, they started playing it up somewhere around halfway through, and cranked it up for the OVA.
The villains, resembling those of an Ultraman show (Ultra Seven especially), also attracted older fans.