Do you all like collecting train tickets? How do you keep the train tickets?

I have kept my train ticket since I went to college. It was just an accident at first, because I have a habit of putting it in the interlayer of my wallet every time I use it. Then two years later, I found that there were many train tickets, which represented the days of my summer vacation and winter vacation and the distance between me and my home. Then I gradually stayed. After the business trip, I will put them in a place similar to a small photo album.