I think I dropped aswell around mid-season of 6. I liked the show but certain things were annoying, like that slowly building plot etc.
It had good moments, the setting and characters were indeed interesting and well-written, the show really rocked when it was on it's best but for some reason I think I didn't want to waste time too much, but dunno maybe one day I might watch it again and catch up where I left. Maybe have to think and see.
I also read about the Maiden-song used in recent episode, it's really cool thing and nice clip, calm setting and singing to "When The Wild Wind Blows".