Having seen how Git is used with Moodle, I used it on my MSc project because of its easy ability to be operated stand alone without any form of server. This gave the advantage of having version control, the ability to revert back changes and see a full log history.
I admit to prefering GUI's for most things having spent a year working on a project with only a VT320 terminal connected to a machine running OpenVMS. The command line is there when you want power, the GUI is there when you want a little more speed and less use of brain power.
As for operating systems, that can be debated until the cows come home. I don't really have a preference, but choose the one needed for the job in hand, having used Windows, Linux, Unix (Solaris and Silicon Graphics), Mac, OpenVMS, DOS, CPM........
Back to 'Git', its real power for Moodle comes with its ability to cope with multiple developers with a large hierarchy that are distributed all over the place. So anybody can make a fork and start messing around without fear of mucking up things and having the ability to pull in and merge recent updates from the parent. BTW has Maven ever been considered - as Moodle is a sort of project? And is Mercurial better than Git?
One of the next things I want to try is a Git server on a Raspberry Pi
Cheers,
Gareth