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.
Critical Research Failure: According to Word of God, the series is called Level E because he thought the english word "Alien" started with the letter E. When he was later corrected, he said he based it off of "E.T."
Fridge Brilliance: This series is made of moments that look like wall bangers until everything is revealed.
Ho Yay: The Prince and Yukitaka get this in spades during the first few episodes. The "I love cats" line got him many a raised eyebrow. Doesn't really get much better after the Prince revealed his true personality. Because, no matter how much Yukitaka claims to hate him he is still going to listen to him and even help him before he catches himself.
Inferred Holocaust: Subverted. After Yukitaka accidentally blows up the Prince's ship, a clip show plays of the funerals of those caught in the blast. Double subverted when it turns out that there were no casualties, much to Yukitaka's relief.
Jerk with a Heart of Gold: Well, sort of. The Prince genuinely likes earth and would rather not see it destroyed. He even helps Kyouko get the body he always wanted. Sure, he claims he did it because it was fun but who can ever really tell with him?