[johnchristopher]

I have a few domain names but I don't know which one I should use to replace my usual [e-mail].

Should I go for [e-mail] or [e-mail] ?

[CaptainBern]

I personally have a "vanity" domain that spells out my last name (the TLD forms the last two letters). So I just have <firstname>@<domain> for personal stuff, and then for example git@<my domain> for github, spotify@<my domain> for spotify etc.

The [e-mail] approach seems like a clean way to do it as well.