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.
Inferred Holocaust: So all those children on Ra's ship got nuked? Sure, the bomb was rigged to go off anyway, so the choice was between letting innocent people die or killing the Big Bad and presumably fewer innocent people. Thus, nuking Ra and the kids is arguably the lesser of two evils, but the Fridge Logic still pushes the act straight into Black and Gray Morality.
Special Effects Failure: Retroactive example from the Blu-ray edition. The picture quality is so much higher than when the movie was filmed that you can see the wires holding up the Death Gliders (especially during close-ups on the pilots.
Unfortunate Implications: The film's story takes a rather colonial tone to the depiction of the natives. Namely, they are primitive yokels, helplessly oppressed by the local authority until they are armed and led by the predominately white soldiers of a Western military power. Thankfully, the subsequent TV series moderated that tone considerably.
The first Kawoosh, when you had no idea it was coming, and in movie-sharp clarity, epsecially if you were watching on the big screen. In the shows, it's cool, but seen in the movie, for the first time ever? Breathtaking. Also, the way the masks retracted into themselves.
The trip through the portal itself is pretty spectacular in its own right.