I have also like quite some domains.

One just firstnamelastname to have it One for homelabbing One for business One, because I thoght firstname@lastname.email was a cool idea. Now all my accounts run through it and I cannot change it anymore :/ One for my old startup, where I just like the name to much One for another old business, but my mailserver runs through that domain, and it is too much of a bother to change that 😅

So, remember folks: don’t buy too many domains, it becomes a liability.