I feel fortunate to have one of the most responsible kids on the planet -- at least when it comes to taking proper care of electronics. (If only he were that responsible with his homework.)
He knows his way around the business end of a modern AV receiver. Being young and wiry comes in handy when you're plugging and unplugging components in tight places. He knows as much about putting a system together as your average Best Buy employee. Okay, make that MORE. :o)
And yes, I'll admit that having his own Tivo may be a bit of wretched excess. But it only has one, not both, of the tuners hooked up. That's where I draw the line.
Still, you haven't lived until you've played Smash Brothers in full surround with the sub blasting.