They're weird, creepy, cinematic, and moody. I love that kind of stuff. And I like the breathy/ethereal-ish vocals too. And I love the use of the orchestra in their songs. Here's some of my favorite songs of theirs:
"I want your love"
"Hands in the dark"
Normally I am really freaked out by horror films and anything scurry like that, but this one's pretty cool/definitely creepy. I'm throwing it in for a good measure.
"The Killing Spree"