Once you get used to reading diffs in your terminal, git -p (and -i) turn out to be very useful friendly. It's really easy to just slam y or n a bunch of times, rather than click around a lot.

big just uses text diffs as well, only color coded which really adds to the readability of it. I don't need guis for most of the things. The benefit of GitX over tig or git -p is that it easily allows to stage a single line instead of the whole chunk