I have a somewhat unhealthy obsession with Swedish armored fighting vehicles (although my disease is not quite as bad as T___A's attraction to communist frying pans and the like). By far the most well known Swedish AFV is the Strv 103, one of the more unusual MBT designs from the Cold War.
However, there are also numerous other Swedish armored vehicle designs that I find interesting. Such as the Kranvagn, and the Strv 74.
If you are interested in learning more about Swedish AFVs, I would highly recommend consulting this excellent site. Be warned, most of the documents therein are in Swedish, so at least have google translate open in another tab.