I was raised in Canada, but have lived in England. My grandparents were all English (dead for decades) and I’m really quite annoyed with them for emigrating. From an outsider’s perspective, some of the things that are great about living in Britain;
the size - so much variety and you can get anywhere within a day or so.
gorgeous landscape - I particularly like the gentleness of the south, but really it’s all quite stunning.
the older architecture (anything prewar). Britain is so lucky to have masses of solid & lovely to look at buildings. I mostly lived in Georgian buildings when I lived there, but am very keen on Edwardian, deco, and interwar stock.
food - really amazing traditional food & an enthusiastic fandom of other cuisines. Your supermarkets are so good!
the level of debate around contentious topics is braver and often more thorough than Canadians would ever have. We’re lazy that way and compliant.
British comedy, tv dramas, the contributions to contemporary music.
Seaside towns, BBC shipping forecast, local and National museums, village pubs, that it’s just one time zone, Country Living magazine, my grandmother’s shortbread and scones, yes to cheese, the coastline, blue plaques, spa towns, wonderful independent shops, I could go on :)