I play a fiver in drop C for 2 of my bands [with a low A or B]. Never really used to be into drop tunings, but that low key note comes in handy for all the music I play. Because all the songs are written in C, I can go back to that low note any time I want and it will be easy no matter where I already am on the neck. It's a common style of playing in Rock and Metal and I reckon even Funk guys could really use it a lot. I'd play in C standard, but I prefer that only 1 of my 5 strings needs to be that loose.