My opinion page addressing inquiries concerning clawhammer technique.
I primarily use six tunings and have tuning charts and chord charts for all six on my website. You can find them in the "instruction" section of my clawhammer tab page. I love them all as each seems to have a unique quality that makes certain songs just "come alive". That being said...
I use "G" and "Open C" much more than the other four tunings listed on my site. Interestingly enough, I probably use Open C Tuning (gCGCE) as much as G Tuning. This may be due to the fact that I'm a baritone and sing a lot of songs in "C" and "D". Open C Tuning works much better (at least for me) when playing a chordal style backup than does "Double C".
Thanks... Mike