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.
Badass Decay: More of an enforced example. Since the series itself is not long and the arc that it occurs in is only about eight episodes, we clearly see how the regaining of Orson's emotions and the weakening influence that Hyuri had over him turned him from a cool, emotionless fighting juggernaut to a whiny, emotional prick. Though you have to give him credit: he can still handle himself with a sword pretty well without being a berserker.
Chaotic Evil: As opposed to conquering Lodoss, Wagnard's goal is to burn it to the ground.
Complete Monster: Wagnard is an Evil Sorcerer who was kicked out of his wizard's academy for practice of the black arts. As a result, the egotistical Wagnard has decided to awaken the destroyer Goddess Kardis and cause The End of the World as We Know It largely out of nothing more than spite and a petty grudge. Wagnard uses many as pawns, leading to large scale battles and many deaths to catch the pure-hearted priestess Neese, who is the reincarnation of Kardis. Wagnard spares no effort in trying to murder her friends, and when he has Neese captive, subjects her to Cold-Blooded Torture to awaken Kardis within her. At the end, Wagnard expresses sheer glee in awakening Kardis to kill all that lives, solely so he can reign supreme in a 'Kingdom of the Dead.'
Narse. Oh a thousand times Narse. Be it his mouth full of fangs, his connection with Kardis or the fact he's the size of Godzilla. Then there's his roar.
Subbing versus Dubbing: The English dub often divides a lot of people; there are fans of the dub, to the point where they admit it's a favorite of theirs, while some others find it detestable. Still others think that there's a certain Narm Charm to it. Either way, Lisa Ortiz's Deedlit (her first role ever, incidentally) is considered one of its greatest assets.
This is especially amusing given that Word of God is that they prefer the voices in the US dub of the OVA...
Suspiciously Similar Song: Listen to this score. Now listen to one. If you're wondering which one came first the answer is Leviathan. (the TV series came out in 1990, the film came out in 1989. Do the math.)
"Kiseki no Umi", the TV series' opening theme, sounds suspiciously similar to Karl Jenkins' "Adiemus".