An actor's job is never easy; he has to bring as much conviction as he possibly can to every character he essays... otherwise he gets a nasty critical review.

A good acting performance is generally one in which the actor gets into the skin of his character and leaves a strong impression... of his character, not himself... on the audience.

There are a number of instances where actors deliver a blockbuster at their first attempt but then fail to live up to those high standards or fail to deliver across a range of role or simply fail to deliver and end up being labeled mediocre.

Check out a brief list of a few less than impressive actors...

An American actor and director, Ben Affleck has starred in films like “Armageddon”, “The Sum of All Fear” and “State of Play”. However, he has had more than his share of failures, including “Pearl Harbor” and is considered King Midas’ alter-ego… everything he touches seems prone to errors.PA
Action star Jean-Claude Van Damme is known for his martial arts moves, but it's his moves in the bedroom that made waves when the actor recently recalled his affair with "Street Fighter" co-star Kylie Minogue.PA
An English actor, Orlando Bloom is probably most famous for appearances in the “Lord of the Rings” and “Pirates of the Caribbean” film series… films more famous for their sets and cinematography than thespian skills.PA
Canadian actor Keanu ReevesPA
Hayden Christensen when he was still clean and shaven during his Star Wars years.PA