Do you love a good series? I do. They're great to read, to get to know characters and situations and relationships that play out over a long time and grow richer.
Series are also interesting to write, in both good ways and bad ways. Good=your world is already developed, and your favorite characters get to come back in sequels, growing and evolving.
Still, as a friend and I were discussing recently, there seems to be a "freshman phenomenon" among series: the first usually seems the weakest.
My favorite series probably aren't different from yours if you're an urban fantasy fan: Jim Butcher's Dresden Files series, Patricia Briggs' Mercy Thompson series, JR Ward's Black Dagger Brotherhood, Kim Harrison's Hollows series, Charlaine Harris' Sookie series, etc.
So what's your favorite series? And did the first one hit it out of the ballpark? What kept you reading?