Even though I've been using my own domains for my email for nearly the past 20 years, so can use whatever local part I want, I long ago switched to using "first

Even though I've been using my own domains for my email for nearly the past 20 years, so can use whatever local part I want, I long ago switched to using "firstname.lastname@" instead of "firstname@". And that was just to prevent dictionary attacks. Luckily my surname is not that common, which helps. I don't think I've ever received any email intended for somebody else.