Not countries but European cities I've been

Cities for to bring family for the first time - London, Paris and Rome
Cities for friends to enjoy - Amsterdam, Barcelona, London, Prague, Istanbul and Munich
Cities for couples - Prague, Paris, Istanbul
Cities for museums and history buffs - Rome, London, Istanbul, Granada
Cities to really get wasted - Amsterdam, Prague, Edinburgh, Munich
Cities with good nature and parks - Valencia, Amsterdam, Edinburgh and probably Barcelona (beach)
Cities that is dangerous - Berlin, Frankfurt, Barcelona, Rome and Bratislava (for those who understand the joke, Miami Vice!)