Gitea. Because, I don't know when Big Brother will decide to snoop or takedown my repositories
But the biggest dilemma I face is everyone's on GitHub, not on my little Gitea instance. I think I should use GitHub for my public repositories where I need collaboration. Anyway, that's a different issue
@activator90 https://forgejo.org/ is attempting to solve that problem. If we all adopt it (or other federated forges that may appear), we don't need GitHub at all.