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.
YMMV: Sonata Arctica
Base Breaker: Fans are divided on whether or not Stones Grow Her Name was worth the time.
Crowning Music of Awesome: Would fall to one of their long, epic songs, such as "The Power of One", "Deathaura", or "Destruction Preventer."
Fan-favorite "White Pearl, Black Oceans" is also a major contender.
Epileptic Trees: Some fans go to bizarre lengths to explain the ambiguities in the "Caleb" story.
Prominent theories include: The stories of Letter to Dana, Shy, and other ballad-esque love songs being related to the "Caleb" story, the arsonist in Wildfire being Caleb, the man in The Power of One being Caleb, San Sebastian being a metaphor for the story prior to Juliet, and the theory of Caleb being multiple people.
The reasons for these theories can range from plausible to outright stupid.
Narm: "Don't Be Mean." Hearing a grown man use a phrase like "don't be mean to me" with such sincerity is a little cringe-inducing. It shows that English is not Tony Kakko's first language.
"Shitload of Money". Look at the other song names on this page and then look at that one again. Why it constitutes narm should be obvious.