I think this is the part where I remember "wait, I dislike most music and especially most singers", . At the very least, the Deine Lakaien song was listenable (if very silly looking because I made the mistake of looking at the music video...whoops), whereas the next song...was not. I just can't into most metal - HOWEVER...
Funnily, terrible power metal is one of the very few forms of metal that I actually like instrumentally to a degree - well, not specifically "terrible" power metal, but you get what I mean. Like, I can actually listen to nonsense like DragonForce...and I was able to listen to this silly Hammerfall song alright as well. The problem is that the combination of music, lyrics, and vocal style is all just so patently silly that I can never take it seriously. The end result is that I prefer to just listen to "video game metal", which tends to have a similar sound to power metal without quite so much of the absurdity.
I don't really have anything that I would ever feel comfortable to claim as being the best of anything...I just like what I like, usually as a function of some combination of liking the vocalist and lyrical style and not being annoyed by the instrumentals, and that's fine. I also don't think I have anything that I grew so much out of where I was like "man, I'm embarrassed to have liked THAT!" either, though. Admittedly, some of that gothier darkwave 90s stuff wouldn't be anywhere close to the first thing I'd ever show or tell anybody about, but I still occasionally listen to it when the mood strikes, and it's fine. On the other hand, I don't have much I like that is distinctly either "the 80s" or "the 00s", which, from what I can tell, seems to be the two main decades of "well, that was embarrassing and I can't believe I was into that".
Overall, I didn't "like" anything you linked, but the Deine L (I am not going to go look how to spell his last name again when I already had to Google it earlier) and Hammerfall songs were tolerated, Moonspell and Sirenia were not even slightly tolerated, and the Apocalyptica was "I don't like this, but I feel like if it was used in the proper context, I could", .
Hello, dad-rock. Funny how we're all products of our respective environments. Sometimes how our specific environment was formed doesn't make a whole lot of intuitive sense (i.e. me), but our specific sensibilities by which we can be appealed through are still so much determined by that formative time.