I talked the adults in my family into stopping the gift exchange among adults many years ago. Everyone had so much stuff already, it seemed silly to pile on more stuff that likely wouldn't get used. Gifts I've received, especially from my folks, often ended up going to the thrift store after a requisite period of retention in a back closet. My lifestyle has always been quite different from others in my family, which makes it even more challenging to give and receive useful gifts. I do send $50 to my niece, who is in her early 30s with a two year old.
We do enjoy putting up lights, and I like making a lighted wreath each year using trimmings from various evergreens in our yard. One thing I really like about the lights is having them on a timer so they pop on before we wake up. The colors diffused through the window blinds give the appearance of a lovely sunrise outside, when it's really still dark and gloomy out.
Though DH and I don't get into conspicuous holiday consumption, we do enjoy a yearly trip to the upscale mall on the east side to see the decorations, marvel at the proliferation (and prices!) of luxury items, and people watch. We'll get there early on a Sunday, bring a thermos of coffee and some home-baked treats to enjoy mid-morning, and be out by 1:00 or so, before traffic gets too bad.
We also enjoy watching our collection of Christmas movies during the month. One I enjoy that we don't have is the Grinch, and we don't have cable to find it there, but I found it recently, ad-free, on archive.org so that completes the collection for me.