The FarScape cast additions really make the last few season far more enjoyable for me whilst the Ori are a far more dangerous foe to face off again, the Goa'uld really stuck around for far too long I think.
Nicholas Rush (played by Robert Carlyle) is definitely a character you love to hate. SGU as a whole really is a series that is best binged, as it's narrative blends well from one episode to the next and whilst it might get really grim at times, when they do have a success it is well worth it and earned--though immediately swamped my more misery and grit