The priest in question was a visiting Serbian hieromonk, and in many parts of rural Serbia, hand kissing is a sign of respect.
Indeed, as I also inferred in my post above--hand kissing is traditionally a sign of respect, and a beautiful one at that. We should not look at every culture through modern Western colored glasses.
Vladimir Vladimirovitch is to be congratulated on his reticence. After all, he has not yet formally been anointed and crowned as Emperor and Autocrat. When de facto become de jure, then proskynesis and hand (or foot) kissing will be the order of the day.
No comment.