Sight hounds' subtle gestures. Instead of barging into you for attention they quietly position/park themselves next to you to "give you the opportunity to pet them".
Borzoi and Collies: blowing in their cheeks when they greet or check you out, it makes me melt.
Deja, GSD, sable WL, female, born 11 / 2013
Cam, Rough Collie, sable, male, born 8/2015