We've had Peanut since 27th December, and he has just recently climbing into my hand and scurrying up my arm when I offer him it! But only when he wants too, and it's normally when I'm just about to go to bed and popping in to give him a goodnight peck!!
He can be equally fussy though and will turn his back to me if he's busy sorting and tidying!
Give it time. Each ham is unique, like you say