What are some communities that aren't here yet that you hope to see in the future?
For me it's been communities like /r/buildapc, /r/buildapcforme, /r/buildapcsales, /r/gamedeals, and /r/consoledeals have been useful throughout the years.
Looks like no one's mentioned it... I'd like a British community. Maybe for discussing news in our corner of the world, maybe just for casual talk like /r/CasualUK.