I like the terminal because:

1. It's the same everywhere. You don't lose knowledge by switching to a company that has a different git client.
2. You know what's going on, mostly. Most clients will assume you want to do things one way and do it that way for you, especially when it comes to fetching/pulling/merging. I'd rather go through all the steps in the terminal myself so I can assure myself that I won't be reliving various past broken merge traumas.
3. If you like the terminal generally, you're probably also doing other stuff there anyway. So you can get used to running whatever commands to test, lint, push, etc. without switching windows or even taking your hands off the keyboard and it becomes muscle memory.