I like bouncing off ideas. And sometimes I do role-play/worldbuilding/storywriting with it. Like a crude version of a dungeon master in a D&D campaign. I mainly use KoboldCPP for that and a local model. And the occasional "give me 5 ideas about ..." or I copy and paste a text in a foreign language and have it translate it. I don't think I have much use for AI apart from that. I've tried programming, summarizing, rewriting emails, and it doesn't really help me for what I'm trying to achieve. At least concerning large language models. That's only one variant of AI. I also use AI algorithms in my phone camera, occasionally to transcribe audio, my email spam filter likely uses some form of machine learning... I'm tinkering with software like Immich and hope it can classify and sort my pictures...
(I wouldn't use it to cross-check my finances, though. I found AI is particularly bad at arithmetic. It'll fail with the first proper division in a calculation. And I'm not sure about the code review. I'll have to try. But most bugs I introduce are more because of some edge cases and I doubt you can tell from a diff. It'd need a solid understanding of the whole codebase. I think it's wiser to spend the time it'd take you to read an AI code review on doing some unit tests or running the code once.)