NHL -
Calgary Flames
CFL -
Calgary Stampeders
CHL -
Calgary Hitmen...but dont' really follow all that closely.
MLB -
Toronto Blue Jays....
NFL -
Minnesota Vikings
NBA -
don't really follow, but I guess the Raptors?
EPL -
Arsenal
CIS - don't follow, but would go with U of C Dinos
NCAA - no specific team
Pretty much Flames, Vikings and Arsenal are the three teams that I follow very closely (some would say too closely).