I was thinking recently about how both Yugioh and Pokemon have thriving scenes for older formats but that's virtually unheard of in MTG. Almost certainly because we still have a variety of formats to play older cards in. But I was thinking about how awesome it would be to have a proxied up gauntlet from an bygone era for MTG and wanted to know what people's favorite format of all time was. It could be standard, legacy, extended, vintage. It could be one year ago or 20 years ago.