Even as a young adult newly out of the nest, I would repeat these familiar traditions -- as well as researching other traditions, to incorporate them -- and throw elaborate Christmas parties. Later, with kids and a job, I switched by necessity to a more minimalist model, eg. a small Christmas tree, some carols on the stereo, and maybe a batch of cookies. And (like many parents) I've felt a crazy mix of guilt and disappointment at not doing more of all that stuff I used to love as a kid.
Not too much guilt, mind you -- the whole point is for it to be fun!
The cool thing is that -- now that my kids are 10 and 12 -- it has become that much easier and more fun to add more traditions and activities to our holiday season! For example, I made an advent calendar this year, for the first time in years: