I'd say national TLD's are to be avoided, if they're known to be
   anti-whateveritisyou'redoing. ".com" is kinda difficult given the US
   just claims it.
   Other than that I don't think anyone cares. The idea is that you're
   easy to find, just focus on that. Robustness... Onion and bit are
   resilient, more so than a bare IP address, so that's worth it /if
   you're expecting domain name troubles/.
   .io is hip right now, but it's like 35usd instead of ~10usd, and it
   feels icky-hip not cool-hip.
   Can't wait till we get 1-N domain names; where a domain name is like a
   tag and up/downvotes and a web-of-trust regulate ordering. Democratic,
   distributed, semi-/inconsistent in a good way. If you pin an identity,
   use a certificate! Way better to use identities that way anyway. Have
   governments certify that a certain entity (cryptographic entity) is the
   natural or legal person it claims to be, allowing any government to do
   that. Totally different ecosystem though. That's life :/