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There's a reason Bloom became a breakout star and insta-heartthrob as a supporting player in two of the last decade's biggest trilogies: He's only good in small doses, or really just as a smirking, swashbuckling sidekick. But watch him lead a movie? You'll be as suicidal as his agonizingly insipid character in the equally laborious Elizabethtown. Bloom's range is too limited, his delivery too catatonic, and he doesn't have an iota of gravitas to pull off a Gladiator wannabe like Kingdom of Heaven. Pretty boy looks can't hide the cipher underneath forever.
Notable Exception: The Lord of the Rings trilogy