And the Firefly DVDs are extra good value as the commentaries are as much fun to watch (and rewatch) as the episodes themselves!

If you haven't seen it yet, may I recommend Sports Night as a new obsession? It only ran for two series but, as with the early cancelling of Firefly, this shouldn't be held against it. It's the series Aaron Sorkin made before The West Wing and is full of the same sharp, witty dialogue only this time set in a TV studio producing a sports show.