We (wife and I) are Disney fans, so we have all of the Disney Christmas train sets and extra cars (also have all the other Disney sets/cars).
We also have the North Pole Central passenger car set (am I the only one that it bothers that only the first three cars had road numbers on them?), a lot of the annual Christmas boxcars (probably 20+), several of the North Pole Central steam engines (3 or 4 - can't remember exactly), the naughty/nice hoppers, candy cane tank cars, gondolas loaded with presents, etc. -- pretty much if it caught our fancy, we got it 
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