Why is it "funny"? I'm using an AMD CPU in my HTPC/media box, and it's absolutely perfect for that purpose?
He's a "trouble maker"
With an attitude like yours... I'd say that's a prime example of the "pot calling the kettle black"
Instead of flaming - and leaving it at that... it would be a better idea if you'd explain why you're of the opinion that using an AMD CPU in a media PC is "funny"?