Well, it's not that I'm ignorant of Standard Tuning, I use it, but I tend to play a lot of open or two-note chords that make it SOUND like an alternate tuning. The reason for this is I think that "normal" chords in a "normal" tuning sound quite boring, and well... normal.
I don't have much knowledge of tunings like DADGAD & Open D, and I figured I'd "broaden my pallet", as it were...