How does that work?
You'd have to have the disc inside the DVD drive to play any installed games on the HDD? In other words you'd have to carry along the DVDs too...why not just bring the DVDs and leave the HDD at home?
Ah, I'm guessing you've never used XBLive. There's a ton of content on Live, especially in the USA. You could spend a year just trying to go through it all. That content doesn't need discs, just bring the hdd over and everyone plays. If someone wants to bring a disc based game they can as well, and we can see different parts of the game with their saves from their hdd. It's the 360 remember, there is no mandatory install so people can bring a disc game over, pop it in and we all get playing right away. The whole machine is built around being very social, everything from Live to voice chat to hdd parties. You are the first 360 owner that I've ever met that hasn't gone to a 360 hdd party! Or maybe it's just an LA thing