One unexpected find in TV-land has been Merlin. When I first heard about it, I envisioned a sort of mutant combination of Smallville and Hercules, and, though I enjoyed both shows in small doses, the combination did not appeal.
Instead, it turns out that Merlin is a fun, low-key drama with a good sense of humor. Colin Morgan, who plays Merlin does a lovely combination of innocence and impishness and Katie McGrath is a marvelous Morgana, and it's possible to believe that Arthur will, one day, be a great king.
The show plays fast and loose with the legends--Arthur knows he's the crown prince, for one--but maintains its own internal mythology quite well. Season One is available on hulu. Season Two is currently airing on the SyFy channel. They aren't good at regular reruns, so missing an episode is a pain, but they have done at least one catchup marathon in the past & hopefully will again in the future.