Some of my favourites

Summerlicious: Auberge du Pommier, Bosk
Dim Sum: Dragon Boat, Golden Duke
Cantonese: Dragon Boat (seafood)
Cantonese (value/casual): The Royal Chinese Restaurant
Japanese (sashimi): Inatei, Japango, Yuzu No Hana
Izakaya: Guu  (now Kinka),  Zakkushi (skewers)
Good vibes & nice interior: Richmond Station
Patisserie: Duo 
Coffee: Rooster Coffee House, Alchemy Coffee 
Hong Kong Style Cafe: New City 

Ferreira Cafe - Portugese seafood

Hong Kong
Lei Yu Mun, Hong Kong -  abalone 
Tuen Mun, Hong Kong - fresh seafood 
Australia Dairy Company (澳洲牛奶公司) - Steamed Egg/Milk Dessert/Toast
Pepper Lunch - sizzling beef and rice food court meal

Afuri Ramen
Midori Sushi 

London: Hawksmoor - pre-theatre menu: bone marrow, sticky toffee pudding
Copenhagen: Host
Stockholm: Meatballs for the People, Speceriet

Chelsea Market - tacos, lobster roll
Ippudo - ramen

Ann Arbor, Michigan
Mani - best homemade pasta and beef tartare