I never thought we'd branch out of dnd 5e but 2 years later with my table we've dabbled in Lancer, Legend of the Five Rings and are looking forward to a Dragon Age game that uses the AGE system. We'll finish a campaign... someday!
Plus, someone's actively looking for a system that'll simulate managing a "House" ala Game of Thrones and waging a mass battle / war against other Houses. Anybody got a suggestion?
That's a start! As long as people aren't getting locked into a single system I'm happy. There are hundreds of great indie systems to try! Mork Borg (and hacks like Bork Borg), Thirsty Sword Lesbians, Powered by the Apocolypse (and the MANY hacks), Monster of the Week, the list goes on!