I'll preface this by saying that this is my personal opinion.
Github (and the like) are becoming prerequisites. You should have a portfolio of personal code you've done that you can freely share. Stuff you are proud of and passionate about (or not so proud of, but are deeply interested in) and stuff you want to learn more about.
Would you hire a wedding photographer without seeing personal samples and talking to them about their interests and opinions on how to photograph your wedding? You'll interview a slew of photographers who just do it to make a buck (and that comes through very clear), but you'll also find a few guys (and gals) who do it with a passion.
Github (and the like) are becoming prerequisites. You should have a portfolio of personal code you've done that you can freely share. Stuff you are proud of and passionate about (or not so proud of, but are deeply interested in) and stuff you want to learn more about.
Would you hire a wedding photographer without seeing personal samples and talking to them about their interests and opinions on how to photograph your wedding? You'll interview a slew of photographers who just do it to make a buck (and that comes through very clear), but you'll also find a few guys (and gals) who do it with a passion.