Disclaimer: Don't own.
i. Sasuke does not smile often. He's an Uchiha by nature, and Uchiha's never smile - or that's what he tells himself.
He just doesn't realise he's smiling when Naruto's making useless attempts to fight him and Sakura's yelling at Kakashi for being late and Kakashi's rolling his eyes and reading his book.
He won't be smiling again for a very long time (an avenger must have no emotions), but that's unknown knowledge to him.
ii. Naruto is rarely quiet. He's a ball of racing energy that's always on the go - it's the only reason he survived this far, they tell him.
But sometimes, he just quietens down and falls behind his team as Sakura blushes at Sasuke and Kakashi's telling her she should focus on her training and Sasuke's ignoring them all. He feels happy, content with this unbalanced team.
Sadly, his happiness will fade with the breaking of Team 7.
iii. Sakura does not lie often. She's honest with what she believes - or, at least, what she thinks she believes.
But, when Naruto arguing with Sasuke and Kakashi's gently chastising them, she sees them for what they really are: a determined protector, a lost child, and a regretful old man.
In those times, she sees herself too, and promises that she will do better next time. Next time comes far too late, but she doesn't know that.
iiii. Kakashi is always watching. He watches his team: biased Sakura, uncaring Sasuke and attention-seeking Naruto - but when he watches them, he sees his own team, too.
Kakashi hopes that his team will stay together, and when he sees them together, held by the twisted bonds they have, he smiles a little and thinks that maybe, they will never break like his team did.
Unfortunately, Team 7 broke in much worse ways than his team did, or ever could. Maybe in a worse way then any other team could ever break, too.
But, of course, the records don't record everything.