my favorite atm is Drop B my ibanez at the bottom is at drop B, and jesus it took me awhile becuase of the bridge -.-
i love drop B i dont know why, its the only tuning i can really REALLY shread in for some weird reason......
I don't play much really heavy drop-tuning metal, so I usually play in standard. I do like occasionally playing in drop D or DADGAD tunings. The low D creates a very cool sort of resonance on open chords. It also makes you think outside the box and come up with some riffs you usually wouldn't think of.