So where did this "Big Boss = Prehistoric" shit come from?

Similarities between us:

-both like Metal Gear
-both like DBZ
-both like Jak and Daxter

That seems to be it.

Gurren Lagann

Don't even know what that is.

Kill la Kill
JoJo
Linkin Park

Nope.

Zelda

It's on my list to get around to playing but as of now, no.

Pokemon

My interest in Pokemon has been waning steadily since Soul Silver, and I would hardly call my liking for Pokemon similar to yours.

Fallout

Fuck, no.

Tom Hardy

Indifferent.

Eminem

I respect what he's done but I don't enjoy rap.

Rammstein
Sharks
Take That

I don't really know what any of those things are.

Unless by "sharks" you mean literal sharks. In which case, no.

Queen

Yeah, this is another good example of a similarity between us. They're not in my top 10 but I own a few CDs.

Sleeping

Like... actually sleeping? Yeah.

Hot Fuzz
British comedy

Nope.

DBZ
JoJo
Zelda
Pokemon

I volunteer as second Big Boss twin.