I know people who've used strange ones like .club or .wtf and gotten by and others who due to the groups they interact with have to switch back to dotcom or something more recognizable etc. If you fall in the latter where someone might not "get it" and maybe even append .com (hello@hb.party.com) thinking it's missing then that answers your question. In my country companies end with Ltd (Limited) so got one for my "company.limited" and it's pretty cool, no issues there and makes for some interesting convo when I give people, also my primary email is hosted at fastmail and my email is me@"my full name".com so I can also when some asks say email me @ ... as a sentence.