I think it is an absolutely beautiful gesture. The Norbertine Canonesses in Tehachapi, California send out a newsletter. In one of the issues there is pictures of the sisters, one by one, kneeling down before the priest and kissing his hands.
They wrote, “After Fr. _______’s thanksgiving Mass celebrated here at the Bethlehem Priory, we have the privilege of venerating his anointed hands used to consecrate and to bless, and which daily touch the Sacred Body of Christ.”
When I saw the pictures and read this my heart melted at the beauty of it all. I remember reading about St Francis: “When someone told him of a priest living openly with a woman and asked him if that meant the Mass was polluted, Francis went to the priest, knelt before him, and kissed his hands – because those hands had held God.”
I have never seen this done before at the local parishes here. I also have never done it. I would not wish the priest to feel uncomfortable, but what a privilege it would be to kiss his hands, the very hands that hold and consecrate the Body of Christ.