@okko
I'm torn between whether I think my identity should ideally be @osma or @osma.fishpool.org. Obviously if I don't own the domain myself, I'd still be subleasing on someone else's. I kind of prefer the email address syntax, though double-at makes for an ugly mention.
What I hate is that it also translates to social.fishpool.org/@osma@fish -- That's just UGLY.
(The reason I don't use this account full time is that I can't yet transfer in from my @[email protected] address.)