@b0rk I voted command line + GUI, with the latter being for my Magit usage (and I guess Github blame view). I use the command line for pull, rebase, log, diff, and many blame operations. I use Magit for committing things, especially selective commits, and thus for checking diffs before I commit and so on. (And some use of git-timemachine in Emacs to move back and forth through the history of a file to track things.)

But my git use is odd since I track and monitor a lot of upstream repos.