I would either be the patient of the week on House, M.D. because honestly who wouldn't want to be treated by House and his team or I would be the victim of the week on CSI:NY because it would just be fun to be on that show.
Probably The Forgotten, because I'm worried that my big ship on the show is A) not going to get together at all. B) Have it really rough, and so I'd love to push them together. Fringe would also be great because Joshua Jackson is hot and plus I'd love to see Walter's expirements and some P&O action.
Grey's Anatomy, because I simply love it! <3 I'd be a patient (really bad, totally irresponsible patient :p) someone falls in love with (A)(A)(A) Oh, and I would love to be trapped in elevator with as many cast members as possible :D