Driving, used to love it and now hate it, so much more cautious and hesitant than i used to be.
Also health, used to just carry on and ignore any sore bit, muscle pain or scabby bit but now assume every little niggle could be the start of a long term health issue 🙄
Random people, used to give everyone the benefit of the doubt but now start off assuming they want to con me or sell me some crap.
Newspapers/journalists - naively used to believe the media but no longer know who to trust for my daily news updates. Was the BBC but Huw screwed that up too.