It is not to be expected that his Roman biographers would treat Hannibal impartially, but Polybius and Dio Cassius give the least biassed accounts.

In spite of the charges of Hannibal's cruelty put forth by the Roman authors, he did enter into agreement with Fabius for the return of prisoners and treated with respect the bodies of Tiberius Sempronius Gracchus (consul 215) and Lucius Aemilius Paulus (216), the fallen enemy generals.

Of avarice, the other charge commonly laid against him, no direct evidence is found other than the practices necessary for a general to finance a war: indeed, he spared Fabius' farm. Much that was said against him (e.g., cannibalism by Polybius) might be ascribed to individual activities of his generals, but even this is uncertain. His physical bravery is well attested, and his temperance and continence were praised. His power of leadership is implied in the lack of rioting and disharmony in that mixed body of men he commanded for so long, while the care he took for his elephants and horses as well as his men gives proof of a humane disposition. His treachery, that punica fides that the Romans detested, could from another point of view pass for resourcefulness in war and boldness in stratagem.

Of his wit and subtlety of speech many anecdotes remain. He spoke Greek and Latin fluently, but more personal information is absent from his biographies. He is shown in the only surviving portraits, the silver coins of Cartagena struck in 221, the year of his election as general, with a youthful, beardless, and pleasant face.