Started collecting as a young child - it all started with my "bird penny" in my childhood piggy bank - I used to dump it out, just to look for that one centennial penny :)
I mostly collect Canadian circulation coins;
I have recently started collecting Canadian dollar bills by series, the oldest I have are the 1937 series of bills, which is of course incomplete, as is my 1954 series of "devils head" bills.
I also like American coins,(mostly pennies), German coins, and older British/Dominion low denomination coins (eg: pennies) with the monarch on it. My oldest/most unique one is an old Jamacian 'One Penny' with Queen Victoria on it.
My want/Secret Santa list is here: http://goccf.com/t/243409