The other day I was casually reading the wikipedia article for Commodus[1] the baddy Emperor from the movie Gladiator and noted how peaceful his rule was. His only wars were when he was co-emperor with his father Marcus Aurelius, and ended when Commodus became solo ruler. By contrast, Marcus Aurelius[2] entire reign was at war and and he is marked by history as the last of the Five Good Emperors.
Wonder how much we think of Roman Emperors comes from the writing and propaganda of their contemporary elites. Rome had an economy based on the back of slaves [3] captured in war after all, so it would not surprise me that elites would praise hawkish Emperors and deride the doves.
[0] https://en.wikipedia.org/wiki/Nero#Military_conflicts
[1] https://en.wikipedia.org/wiki/Commodus#Solo_reign_(180%E2%80...
[2] https://en.wikipedia.org/wiki/Marcus_Aurelius#War_with_Parth...
[3] https://en.wikipedia.org/wiki/Slavery_in_ancient_Rome#Trade_...