Best way to configure powersupply?

Okay, it's getting late and I've spent hours reading debates over single rail vs. quad rail, etc. That's not my question.

I have a BFG 1000W quad rail PSU. I'm running 6x2TB drives, 6xSSD, 2xRadeon 4890, an Asus P5Q mobo, and 7 case fans in my Corsair 800D.

It's all working fine, so what I'm curious about is optimum wiring. Obviously my 4890s have separate cables directly to the PSU, but...

I've daisy chained nearly all my fans and I think I daisy chained some of my drives as well. In fact, I have about 4 other spots on the modular PSU that I'm not even using.

1. Is daisy chaining a problem for drives and/or fans?
2. Is there a reason not to daisy chain these devices (i.e. vdroop causing drive failure)
3. If the fans are daisy chained directly into the PSU do they run at max speed?

Thanks in advance.