I do this all the time. After confession, I kiss the priest’s hand and touch my forehead to it. I then do the same with his stole, kissing it and touching it to my forehead. Whenever I see a priest, I always kiss his hand, his stole if he is wearing one, and his cross if he is wearing one. I also ask for his blessing if possible.
I am a Latin Catholic, but I feel close affinities with the Eastern Churches and traditions. The aforementioned practices are common among Eastern Christians, and that I know of were once common among Latins. Latin priests today tend to not expect someone to kiss their hand or stole when someone approaches them, but I still do it. During processions such as during the entrance, I sometimes touch the hem or edges of the priest’s garments when they pass by.
I have always understood these as signs of respect for the priests’ authority from God, as in many ways they are true representatives of Christ in this world. Though many Latin priests seem shocked at times, they are largely understanding on this practice. Nevertheless, I would Say that more do not expect it than those who do; even in some Eastern churches I have attended, many priests actually prevented me from kissing their hand.