Canadians: any Britishisms you've struggled to adopt?

For Canadians who grew up in Canada, but then moved to the UK are there any Britishisms that, regardless of how many years you've lived in the UK, you've never adopted because they just feel unnatural?

E.g., I can't imagine ever using 'alright' as a greeting and 'horseback riding' just hits right for me even though I acknowledge 'back' is unnecessary.