I am excited to get new facts/stories/knowledge and I noticed how many new and interesting things I've got from the hobby!
As example: before I thought Holland and Netherlands are the same, but now I know they are different, thanks to a member from Netherlands.
I didn't know how many territories France has outside the Europe!
I knew before about Gibraltar, but I didn't know about Spain cities in Africa (Ceuta and Mililla, thanks to 25 pesetas holed coins)...
But the last one and the biggest story is Hutt River (from this topic https://en.numista.com/forum/topic22541.html).
http://en.wikipedia.org/wiki/Principality_of_Hutt_River
Amazing story about amazing country I've never heard before!
Do you have any ineteresting knowledge you get from the hobby?