@aelien right now there seems to be 2 schools of thought. The first is a “value” goblin type that is r/b and runs ring leader as a card advantage engine along with a ton of creatures. Basically closer to the legacy versions only instead of vial, you have moxen/simian spirit guides. It can also run skull clamp for card draw. The second build is more of a grixis control deck that runs ancestral recall, time walk, tinker, and dack along with powerful targets like mindslaver/wurmcoil engine to abuse welder.
They’re both fun but have flaws. The first build ends up relying on syngergy and playing individually bad cards hoping for them to mesh together in a format where stand-alone threats are ungodly efficient. The second build plays like either a slightly worse grixis control deck or slightly worse welder-shops deck. However both builds are REALLY fun and fun is what vintage should be about. I prefer the second build personally.