My problem with your domain is that I continuously typed it as histori.us from memory, whereas with a .com I would have defaulted to a more standard spelling of

My problem with your domain is that I continuously typed it as histori.us from memory, whereas with a .com I would have defaulted to a more standard spelling of 'rious'. (Having typed it enough times now, I do remember - but still every time the way I remember is by thinking of how I got it wrong in the past). That said, I don't see any difference, personally, between .com/.org/.net - remembering the extension is no problem, it's only when the extension becomes a part of the site name that sometimes confuses my memory.