Thom Yam Kung , the hottest Thai soup! The most heavenly (+hottest) version I've ever tasted was in Bangkok, Thailand.
I don't like it like it... jus happen to have it sometimes.. and it's not even the shark fin.. more like the soup base..
My GF loves hot and sour soup, myself I like pork bone soup and shark fin $$$ soup. Clam chowder is good too, especially on a cold day like today (-18c) in TO.