I enjoyed watching the Game and the Ark together because they stand in contrast to each other as the best and worst of Sheppard and McKay.
In the Game we see McKay's arrogance and Sheppard's aggression unmitigated by any of their other virtues spread through a whole culture. Both of them are plagued with stubbornness and unwillingness to see the other side of the picture. Sheppard and McKay have to work overtime to try and keep their worst sides from hurting each other. I think this is a major part of their friendship.
McKay has almost no friends because he's so hard to work with. It's shown in such a hysterical way when Nola refuses to believe that Baden's citrus fruit is anything but an insult.
Sheppard too struggles in the friend department because he's aggressive and doesn't follow the rules. Baden actually cheats at the game and orders the attack on Nola and her people. This shows Sheppard as a man who, mostly before the responsibilities of Atlantis settle on his shoulders, might have just been a bit too quick to pick a fight.
Oddly, McKay finds a friend in Sheppard, and Sheppard a friend in McKay. They are proof that Nola and Baden aren't one dimensional, and can not only get along but thrive together.
(Also, I will always love Sheppard beating McKay at chess at the end and I will always love LORNE! and Radak playing the game.)
The Ark stands in total contrast to the Game. It is Sheppard and McKay's qualities dialed up. It is Sheppard talking McKay down from panic, calming Ronon with a promised fight to the death, knowing Atlantis (LORNE!) will come for them, fighting to save his team, and then willingly sacrificing himself for Teyla. The look on his face when he's breaking through the door is gold. He is a determined man ready to kill if you touch his people, which you did, so prepare to die.
The episode ends with Sheppard reiterating yet again that he would willingly give his life for any of them, even McKay.
Rodney is also at his best. Excited to explore, quick on his feet, comes up with solutions, listens to Sheppard, tries to save everyone, and tries to talk Sheppard out of risking his life. I love the moment he tells Lorne he's not going back to the Jumper because they don't leave their people behind, and Lorne gently agrees and explains that he's not leaving anyone behind.
Rodney may be quick to panic and quick to tell you how you're going to die, but he too will do anything for his team.
Watching these two episodes back to back is great because of the contrast they provide. Sheppard and McKay at their worst and then Sheppard and McKay as they are, which are two men who have worked against their worst traits for the sake of others.
...and next is Sunday. Big, sad sigh.