I have to admit that I'm guilty of just getting a generic biscuit recipe from Delia or whoever (whichever cookbook is easiest to reach

) and just modifying the ingredients to make them more christmassy.
I think a lot of it depends on what your ideal "christmas" flavours are too - if you like cinnamon and apple, or orange, or something similar. It's fun to try to make it up as you go along, I think.