Yep, and I think vocal range is also a must. I think it's a fun idea doing solo stuff, especially when you're not involved in anything else musical at the moment.
Umm, hah, there are a looooot. But I guess a few of them are tool, afi, the red hot chili peppers, and the gipsy kings. Those are pretty much my main ones, although like I said, there are a looooooot.
What about you?