Another vote for the Mamiya 7ii in black. I dig the blue window ;)
Also a chrome M6 ttl. (because they are both mine!)
I also think the Bessa R3M (black paint) is a very cool looking camera.
Kodak Signet 35.
The Speed Graphic!
without a doubt, the mamiya 6mf
The Plaubel Makina is very cool looking, but my vote would be for a Leica M; perhaps this one =>
The Leica IIIf (with a 5cm summicron) ... because she said so :)
IIIF with Summitar , I used two of them and what a combination.
I'd love to have a Mamiya 7. Awesome camera. But cool? Two different things I think.
To compare some non-RF cameras to give examples of what I mean, my Mamiya 645 Pro is a very capable camera, much more so overall than my Yashicamat 124. But the Yashicamat is a lot cooler. A Mamiya 7 is a lot more capable than a lot of these older 35mm RF cameras and I'd love to have one but for cool - I dunno, I think the Retinas and Feds and such are a lot cooler.
Plus, the camera I can actually afford is cooler than one I can't, and this thread has tempted me to pick up one of several different possibilities I can afford. A Mamiya 7 (or 6) while an excellent camera just isn't worth the money to me now.