I think I'm old in that I was thinking how would I write this emoji email address on paper. Also I can just imagine the joys of form validation when you add an emoji into the email address. On the other hand I doubt most email harvesting bots crawling the web would be configured to recognize an emoji email.
You shouldn't use any vanity email address as your only address, unless you want your online life lost to inbound GMail and outbound corporate filters. So, if there's a situation where you need to write it down, use the 'serious' address.
