Ariels are pretty cool, one or two show up at Watkin's each year I've been. The coolest bike I've seen at Watkin's is this though
It's been there the last 2 years.
Info: https://www.nationalmcmuseum.org/2017/09/15/1956-nimbus-750-four/
There's also a replica of the Curtiss V8
It has a shaft drive, and the brake is just a piece of metal formed into a V that presses into the rear tire (which was just hard rubber, no air involved). Set the land speed record in 1907 at 136mph.
If anyone is interested in seeing a really cool collection of vintage bikes though, go to Brim's Imports in Kenton and ask if you can see his bike warehouse. Some really beautiful stuff in there.