If Guitar Hero and Rock Band unleashed a fire in you to become a rock god, we'd advise checking out Rocksmith. Here you can plug in a REAL electric guitar (sold separately, of course) and be put through your paces with a series of lessons, drills and games to give you some genuine skills. Be sure to check out Matt's full review for more information. Note: this is the solus edition of the game, you'll need to track down a cable for it too if you don't have one already.
Thanks to theg at HotUkDeals.