I’ve learnt to use Git in the terminal, and until now I’ve been perfectly happy with my workflow.
I might slowly move to the GitHub app, though: the new GitHub Desktop app allows you to create Pull Requests right from the app!
Give me the option to add labels right from the app, and I’ll be sold!
If you use GitHub.com regularly, and if it’s been a while since you played with the app, give it another try; you might be happily surprised!