I found an old Rolling Stone sheet music book and thought I would learn the song "Wild Horses". Well, I played the chords in the book and it didn't really sound right. Come to find out that it was played in open G tunng. I watched a couple of U-Tube lessons with one being in open G and one being in standard tuning. The lesson in Open G sounded right, while the guy's standard tuning lesson sounded kinda retarded. What a moment of clarity. I'm thinking that getting our heads around open tunings would be a really great discussion. I understand that open tunings are required for slide, but had no idea that one thing they bring to the table is different voiceings even when you are not playing slide.