I have an older guitar which doesn't t have a lot of resonance. I ve heard that playing in an open tuning will make the guitar sound a little fuller, and am thinking of putting this guitar permanently into dadgad , or some other open tuning; while keeping my main guitar as is for most of my playing( I tried doing regular tuning and open tuning on the same guitar , back and forth, years ago; but it became a bit much, especially if performing) . Have any of you found that open turnings give more dynamic sound? And what tunes do you play open? I don t know when and how open tunings became poptular, but I'll m fond of the guitar work of folks like Chtis Smither, Tom Rush, Bonnie Raitt, Danny Kalb,David Grisham and if you recall; John Fahey; and the like -not that I approach their level of playing, but they inspire me. However, all I suggestions about playing open in any type of song and/or style are welcome.