Classical scholar Michael Grant put together an excellent, well-sourced collection of brief biographies covering all the Roman emperors from the first emperor Augustus (31 BC) to Romulus (476 AD) the last emperor of the West. The Eastern (Byzantine) Empire, which was more Greek than Roman, lasted another thousand years until the capital, Constantinople, fell to the Ottoman Turks in 1453. (Trebizond, a rump state of the Byzantine Empire, limped on until 1461).
With the exception of some truly great emperors like the first Augustus, Hadrian, Marcus Aurelius and Constantine and a handful of reasonably good ones like Nerva, Antoninus Pius, Trajan and Vespasian, the remainder tended to run the gamut from competent to mediocre to unremittingly evil or hopelessly insane. Moreover, in the case of the majority of the non-entities who held the job--some simultaneously and for very short periods--the emperors' life expectancy was short. However, for that brief period they lived much better than most people in the ancient world. Many were assassinated, killed in battle or executed and, while they remained in power they had to deal with constant attack on all frontiers from Vandals, Goths, Huns et. al. (by the time of Romulus the legions, including the generals, in Italy were mostly German) palace intrigue, rivals in their own family, plagues, famines, economic disaster, hyper-inflated currency, riots and civil war. To paraphrase Gilbert and Sullivan's police sergeant, Ah, take one consideration with another, a Roman emperor's lot was not a happy one.