I always liked observing the degrees of seperation between two seemingly unconnected people/things.
I selected Katatonia and Cibo Matto. Katatonia being a former black metal, now currently goth rock band. Cibo Matto being a hip-hop sort of collaboration between Miho Hatori, Sean Lennon, and Yuka Honda. Pretty much on different ends of the spectrum.

But observe:

Katatonia
Opeth
The Gathering
Theatre of Tragedy
Type O Negative
Coal Chamber
Tool
The Melvins
Nirvana
Beck
Cibo Matto

The connection is made.