Heavier tone?
Consistency between instruments
Moving out of the standard guitar range for "diversity of sound"
Saying "I play in all fourths tuning" makes me sound dapper, sophisticated and mysterious

I guess what I don't know is can I just buy a set of 7 string guitar strings and use the first 6 of them, or will this wreak havoc on my guitar, setup, etc? I have very rarely played a 7 string guitar so I don't know how thick that b is going to be....
I know what you're thinking. Why doesn't this guy just go buy a 7 string guitar if he likes it so much? Well it's complicated, but I believe the simplest answer is my wife won't let me
