I think either Scrubs or Lost. However, there's some of the old classics I used to watch as a kid, Saved by the Bell, Power Rangers, all that stuff. Great nostalgia.
I'm thinking though, where's ER, Friends, Will & Grace, My Name is Earl, West Wing? They're all NBC, I want those shows! Well maybe not Will & Grace, but it would still bring in a different age group to buying the shows, and they could offer some sort of 'Show Pass' for Friends and other shows that have ended, where you buy every single episode for a discount price.