One tradition we keep in our house is the eclectic tree 'theme.' We all get a new ornament each year that represents us in a unique way. For example, I got a car ornament when I was 16 and I had a runner ornament in 2000. Mark and I chose to hold on to that concept/tradition rather than buy matchy theme ornaments. It's fun to reminisce when you are hanging up the old ornaments.
This year Chloe got her 'Baby's First Christmas' ornament. I bought Mark a lacrosse player ornament and we all got our initials for the tree, including a 'G' for the family ornament. The Texas Tech ornament in the middle is old, but it's where Mark and I met so I featured it. The picture ornaments are a new tradition that Mark and I started when we married. Every year we buy a frame ornament and put a picture from that year in it. In 20 years, we'll have a tree full of pictures! I'm sure you've noticed that this year's frame still has the 'hallmark' family in it. I'll change it soon.