In reply to Rocco R16V:
A cafe bike is a like my autocross-prepped BMW 2002, and a chopper is like a lead sled custom with a 4" windshield.
One of them goes, stops, turns, and is a lot of fun to drive. The other one is all about looks.
Of course there's a broad continuum. There are useless cafe bikes and relatively usable choppers. But fundamentally the inspiration for a cafe bike is a sportbike from the past.
Personally, I don't have much use for vehicles that are only fun when you're standing around looking at them, but that doesn't mean folks can't enjoy building trailer queens and Starbucks adornments.
I would very happily ride a brand new sportbike, but something that (like my old 2002) hits that middle ground of classic aesthetics with updated performance, while maintaining some of that raw mechanical feel that older machines have; that's one of my ideals.