Mmh, I don't really care about the lyrics, so I think I don't get a lot of what the author wanted to say (my english is far from perfect and I can't understand 90% of metal lyrics only by ear, and I don't bother reading it... For me singing is more like another instrument).
For example, if I remember well, some said here that Kissing the Shadows is kind of a love song (it talks about scent, caress, etc etc...) or maybe it was a joke, but most of the songs I prefer must be powerfull, or fast, like KTS (my favourite Bodom song) which is fast all along.
Another example would be Strapping Youg Lad, it's powerfull all along, it cold be a fight between 2 fantastic heroes or creatures (It doesn't mean I'm a fantasy heavy metal fan
)
I like songs on which I can make me some movies in my head, as if it was apocalypse or something like that ^^, or songs that don't have a particular feeling, or a strange feeling, like Tool, then you read the manga BLAME! so that everything looks strange and meaningless.
Anyway I recently listened to "Shy" from Sonata Arctica, and yep', it really fits it's title.