Then you may enjoy ShowCase’s “Lost Girl.” I believe you can watch it streaming on Showcase.
We’re in the third season, and things are getting more and more interesting. The show is about miscellaneous Fae creatures, starring a Succubus (Bo) who sides not with the Light or Dark but rather remains Unaligned, which no one in the memory of all the particularly long-lived Fae has ever done. She particularly likes defending humans, much to the chagrin of the Fae around her. The show is mostly episodic, but does have an overarching plot which does move forward in a natural-feeling way. The acting is sometimes over-done, but it still manages to hold interest from week-to-week, and as the third season begins, there are extremely un-subtle hints that Bo’s character is changing towards the Darker path.