For a trip in the UK I would say Lleyn Peninsula , Derbyshire, The Gower, Snowdonia and most of the North and West of Scotland are amazing.
In Europe I love the Nordics for a non beach holiday, Stockholm is stunning, Helsinki lots of fun and go north of the artic circle in the summer .
For a European beach I love the rocky shores of north Corsica.
Further afield for beaches australia is amazing, cancun and Miami lots of fun. For food and life Mumbai, Paris, New York, Tokyo are all places you can go out every day and night and enjoy yourself.
Above all though my two favourite places have always been Canada and australia, I love the wild beauty, the space, the wildlife and everything about them both. As I moved to aus I would have to say Canada is now my favourite holiday destination.