I will play too. Looking down my list I have a ton of favorites, so here is one I have always liked a lot, hence the reason I kept it as my last 19th Century card..
I don't know if any have real sentimental value but this E90-2 was the first card of over 700 I acquired from the Trucker Boy find. No one bid on this for 1.5k on ebay....then the seller put it up again and we made a deal for it at 1k. The rest is history...
and I don't know what this Paramount Clothes Premium would be worth, but not much, and I like it as it's not often seen.