Maybe the night daughter Kate sang for Seamus Kennedy and he said WOW! and asked for another.
Maybe the afternoon not too long before my mum died that I spent all afternoon playing songs on her viola for her. She hadn't been able to play or hear it for years.

Maybe the afternoon I spent playing my harp for Mr.'s dad (who was terminal). We started home (14 hr. drive) and recieved a call half way that he was gone.
Maybe every month after we play for the residents at the nursing home and they come up with tears in their eyes and say "Thank you."

Maybe the night daughter Kate did her Ethel Waters impersonation with a solo at a choir concert........rocked the hall. We heard about that one for weeks!
Maybe the day son Luke said he wanted to become a Sky Marshall. (Those of you who know Luke's background will appreciate this one.)

I can't say as I can pick one...........