Fwiw, my usual work flow involves 2 remotes, one for the project's mainline repo and one for my fork.

I frequently have 3+. Github/Bitbucket if it's shared there, maybe a original repo if it's a fork I'm submitting PRs too. My server if it's something I'm running an instance of - I like to deploy my personal services via Git pushes. Sometimes a copy of the same codebase on another personal computer or two - if I don't feel like pushing it to Github, sometimes I'll push and pull between computers directly.