Is there a reason to use SourceTree a lot? I only fire up Source Tree when I'm feeling too lazy to compose a search command from the terminal. Of course, `git log | grep phrase` usually does the trick but if I need anything fancier (date ranges, for instance) I'll just fire up ST.
I use it mostly for the graphs... We work between a ton of branches and it's nice to see the visualization. Also, it's a lot faster when I have to push multiple branches to multiple repos (looking through 2 remotes with 7 branches each right now).