So obviously the Summer and Winter Courts are pretty darn cool. The current setting my group and I have come up with has a fairly large contingent of Summer Fae hanging out (protecting a gate from the mortal world to parts of the Nevernever) and of course some Winter keeping an eye on them. I'm in the embryonic stages of a story involving this, but I'm curious on one point.
How the heck does one RP these guys? I mean, they speak in riddles, never lie (technically), and are always plotting like 6 steps ahead. I want to not sound like a derp, so any advice is appreciated.

Which tends to be more effective? How well do stunt based characters stack up with powers based characters? Do PCs mix and match at all?

So I'm curious what factions and/or supernatural types, if any, people use that are either not in any of the books or briefly mentioned. I know there are some write-ups of a few interesting things on the Resources page, so that's helpful. I'm more interested in learning how/why one would use non-canon things and groups, and how it went? Any favorites you have used in games in the past?

That is awesome. Thanks a million!

I'm actually putting together a mish-mash setting with elements of DFRPG, Conspiracy X and the WoD. The Laws of Magic are there, but the White Council isint as important as it thinks it is in this setting.