Claps her hands properly.
Waves hello and goodbye more often than not on cue.
Gives kisses (only to mommy and toys, not to daddy).
It seems to me that Willow is an even keeled baby. She definitely has moments when she's extra excited and happy, and other times when she is especially fussy. But overall, I think she is pretty mellow, observant, and willing to go along for the ride.