I've started tinkering with open slide tunings. (I usually play standard tuning, but I began playing around with open tunings about a month ago.) I have an acoustic resonator guitar tuned to open D, a Bohemian oil can guitar tuned to open A, and a Les Paul Classic Antique tuned standard. But I find myself playing around with other open tunings (usually, G, E, and B) on the others. OK, fellow slide players, what are your favourite open tunings, and which one do you think gives you the best range for playing different songs without having to carry more than one or two guitars around?