My cat loves when we decorate for Christmas too, for another reason...he's always very keen on peeing under the tree and the little tree skirt we put under it.
This is sock's second christmas. He did not bother us the first christmas as we had only just brought him home but a year has been and we found out he is a little devil kitty as we call him lol . So were just waiting for the tree to come crashing down........
I have two cats and the youngest one will attack the branches and get underneath the tree skirt until we start putting presents under the tree...then he'll walk all over the presents : p The oldest cat steals all the ribbon out of the gift wrap box while we're wrapping gifts and runs off trailing ribbon all over the house.