I like the fact that you can stream a slideshow and music at the same time from a PC, we use this feature a lot during parties and people always get a kick out of it, usually the pictures start a lot of "remember that" or "remember him/her" conversations.
The controllers can also be used with your PC, but you have to buy a $20 adapter for the wireless ones, still worth it though I think.
The games speak for themselves.
XBL is a great service, I was appalled at first at the idea of paying for online, but after using it, I can honestly say it's worth it, and I'm a pretty cheap gamer.
Streaming music from your PC/MP3 Player/Hard Drive during a game works very well too.
Currently Playing: Saints Row 2 | Battlefield 2 | Company of Heroes
Recently Beaten: Gears of War | Super Mario Galaxy | Darwinia | MGS4 | Sam and Max Ep. 4, Portal | Mirror's Edge | Uncharted | Mass Effect
Looking Forward to: Alan Wake | Splinter Cell : Conviction | The Last Guardian | Batman: Arkham Asylum | SMG2 | Mass Effect 2 |
