Now I could create a gigantic post if I simply posted all the videos I love and the artists I love, but I'd drown my own thread before it ever began. Don't just dump a link in here, give it at least a label and, if you want, a little back story.
Now me, I love all music except the majority of rap and screamer metal (but not all). I think its interesting when two genres collide and produce something beautiful.
Opera + Metal
HolyHell - Phantom of the Opera
http://www.youtube.com/watch?v=bkkHp26w9no
This band I ran into via related content from the video above since they also made a remake of Phantom of the Opera. I've since become a bit of a fan and I intend to buy all of their albums.
This is my favorite song of theirs
Nightwish - Planet Hell
http://www.youtube.com/watch?v=QtoAO1EFuPw
This band I stumbled across using my method of discovery (wikipedia band list + youtube). It's the only song I've found on youtube of theirs, and they only have one album out, so they're relatively new.
Bride Adorned - Killing Frost
http://www.youtube.com/watch?v=JSYXpt0RRHI
Like Nightwish, I stumbled across this band via afore mentioned video's related content.
Avantasia - Lost in Space
http://www.youtube.com/watch?v=o26SlmROH5Q
Now this band seems to be attempting (and failing) at a facade of ruggedity. Its like when a 5-year-old girl tries to make herself pretty by wearing her moms make-up, but winds up looking like a clown crack-whore. It just hits me funny.
Ruoska - Alasin
http://www.youtube.com/watch?v=wV19mYe3184
Last, but not least. This video was an unintentional suggestion by our own verbose.
Electric Six - Danger! High Voltage!
http://www.youtube.com/watch?v=aQQeg3jYgOA