Whether you eventually want to start your own business or just want to work for a good company ; you still end up at the same place - in a team environment, needing secure, painless version control hosting. I can tell you right now there is no other service I would use or recommend other than GitHub.
Everyone knows about GitHub because everyone shares links to their projects hosted on GitHub! Same reason they provide https://gist.github.com/ and http://pages.github.com
Whether you eventually want to start your own business or just want to work for a good company ; you still end up at the same place - in a team environment, needing secure, painless version control hosting. I can tell you right now there is no other service I would use or recommend other than GitHub.