I agree with the point about non common top level domains. I was considering getting firstname@lastname.email at one point, but decided against it because I imagine I’d have to explain the concept of the .email tld to a lot of non technical people.
I did my best to explain it briefly to a clearly non-technical but savvy-enough-to-worry person; I don't think he quite understood, but more was satisfied having spoken to me that I didn't 'sound like a cyber hacker' or whatever.
Generally I find it nothing but helpful to do this, but it is awkward over the phone, and I often chicken out if asked other than in a web form for my address, and give something more generic.
I received similar entertainment from having to provide my full 'memorable phrase' for password reset over the phone. I only ever expected to enter it into a web form, so I just used a randomly generated string from `pass`. It was 100ch long with symbols, and I had to read the whole damn thing out. I say entertainment, perhaps only in retrospect. The guy obviously enjoyed it though, like there was some point well before the 100th character of random alphanumersymbolic nonsense in response to 'what was your first teacher's name' where it must surely have become clear I had the answer. (Also the faintly chuckled 'yes please sir' when I paused before starting to ask 'er, all of it?')
But yeah, prospective employers is ugh, indeed: I went to the effort of looking up the intended recipient's phone number and called her -- on my dime, from halfway across the world -- so she wouldn't miss the interview the mail was about... And that bitch Christina C was apparently going to blow it off anyway, so far from a thank you, what I got was a complaint that my accent was hard to understand.
I wouldn't use it outside of German speaking regions and that's why I still have a ${lastname}${firstname}@gmail.com address.