I play everything in standard tuning.
Open tunings are cool, though. They have their own resonance.
But, I didn't want to have to switch guitars to play
slide. Also, the fretboard patterns are all there. Playing in open E is like having to think in a different language for me. It takes some finesse to get the classic "Duane-ism's" down on standard tuning. The slide has to traverse more "fret space," but once you get it going its a-okay. Someone pointed out that the right hand technique has to be more precise, and I think they're right.
Behind the slide technique has been a great thing to work with.
You can form major and minor triads, arpeggiate chords, and hit both major and minor thirds for lead phrases. String skipping is something else I've worked up for leads. I've had a good time playing "Blue Wind" and "Star Cycle" by Jeff Beck lately.
Randy
"Impossible" is just someone else's opinion.... its a dare, not a fact.