All 12 of my ratlets are kissers Some more than others, but they all give me licks and kisses. Emma, my 3-month old girl from my foster litter, the most. She licks my legs, arms, hands, face... I adore her
Bastian is a HUUGE Licker. He will lick my hand like crazy when I hold him even if he is shaking from being nervous (I think he has anxiety problems as he always seems high strung and we are working on the socialisation thing) but yeah that's ALL he does, it's not just occasional. Even when I put my hand in the cage lick lick lick lick lick.
Odin licks occasionally, and Joshu licked and you could tell they were special kisses D: He gave me a few on the face before he passed on.
Our eldest has licked on occasion, but our youngest (2 1/2 months) is the licker. Usually, she does it after we have finished finger wrestling with her - or rather, when she's had enough she'll start grooming our hands as a way of submitting.
If she's not grooming you, it could be that she just likes the salt - same way as dogs do.