If it's crap ... We'll tell you
Today's generation of TV is some what great(HBO and others) and today's generation of video games are great too, so what game would you like to be a TV show? Just think about your favorite game getting an animated or Live action TV series.
Mines: Metroid and Legend of Zelda(if done correctly) and probably Bat-Man: Arkham (series)
Who know's it could be done, just look at Pokemon it's still going strong for a full decade.
"Mafia 2" great story, great cast of characters, lack luster gameplay. In other words, would make for a great T.V show, seeing as everything is awesome except for the bore you to death gameplay.
Ive always thought a Mini series of Alan Wake would be amazing! Twin Peaks meets the twilight zone. Especially since the game never got the recognition it deserved.
Honestly, GTA 4 or Red Dead Redemption. Both have good stories and characters that have enough going on in their respective universes to justify a show.