Sorry, I’ve had this for 2 months, but it’s too broad a question, too many characters to think about! I think it varies for different vampires at different times in their lives and unlives. 

Louis didn’t get very excited about Christmas until Claudia. She had been with them for only a few months, and then Christmas was upon them. Lestat transformed the parlor and courtyard into a little winter wonderland, Claudia was excited about that (and she put up a fight in March when he said they should really take it down), and she had a stack of presents under the tree on Christmas night. 

Her first priority was giving Louis his gift, which was a pack of drawings bound in a soft leather portfolio Lestat had picked out with her. Drawings she had done of him, Lestat, their little family, their house. He was deeply touched, and few Christmas gifts ever topped it. It was at that moment that he finally understood the point of that holiday and his anticipation for that kind of moment does build, he gets into the spirit of it with everyone else *u*