He smiled, a smug expression with no real humor in it.

He smiled, a slight expression, one that didn't stick around for long.

She smiled, an expression that only increased his attraction for her.

Then he smiled, an expression that lasted for only a fraction of a second.

She smiled, an expression he remembered, wry and knowing.

He smiled, a surprisingly sweet expression on his craggy face.

I smiled, a warm expression calculated to boost her confidence.

He smiled, a slight, nervous expression that lent a youthful quality to his features.

Suddenly he smiled, an expression that seemed to be forced, motivating himself, having to fight off a deep inner fear.

She smiled, a grim expression even by her own standards.