Café culture, Göteborg
Have a picnic in the archipelago (see 'musts') and even if you don't have children, a visit to the Slottsskogen park where the locals relax is a must. Otherwise I just love sitting in a street café or bar and study people and watch the trams whiz by. Göteborg has more cafés than anywhere in Sweden and you will find many in for instance Linnégatan or Vasagatan as well as in Haga.
Fondest memory: I have so many fond memories after growing up here for 14 years that it would be impossible to pick just one.