I'm kind of in the same boat. Grew up in Chicago, but have lived in St Louis for 18 years. I'll never forget moving here in July 1987, three months later they won the NL pennant, and I thought, Oh, so THIS is what it's like! I should have moved here sooner!
Of course, I grew up a Cubs fan, as the White Sox were almost like a team from a different city.
Cards-Chisox equals the Cubbies World Series from Hell!