I think suffix is much more natural for anyone using a left-to-right writing system. It's not "empire strikes back: episode V: star wars", and most non-technica

I think suffix is much more natural for anyone using a left-to-right writing system. It's not "empire strikes back: episode V: star wars", and most non-technical people think TLDs are hierarchical from left to right. : works well semantically, but like ! I think it's too thin to be ideal. _ and - are commonly included in usernames so I wouldn't use those. + is more aethesthically pleasing than @ to me. I like the idea of ~ but I think a lot of people do not know it's on their keyboard. > as a kind of arrow has some appeal too.