I've read all 7 books in the "Masters of Rome" series.
I actually loved the first three (The First Man in Rome, The Grass Crown, and Fortune's Favorites) but really did not enjoy McCullough's take on Julius Caesar himself.
I thought that, despite her claims to the contrary, she really had fallen in love with her title character. I thought that Caesar's opponents were dumbed down in an effort to elevate Caesar. I thought her treatment of Cato, Pompey, and Brutus was horrendous.
And Antony? In addition to portraying him as a drunken lout, McCullough even takes the unique position that Antony never actually delivered an oration at Caesar's funeral.
Caesar's flaws and exercises in poor judgment (e.g., cuckolding the wives of his fellow Senators is, basically, explained away as a practice he started because his mother, Aurelia, suggested that the reputation as a pathological seducer of women would remove the unfair slurs of a homosexual relationship with King Nicomedes). When Caesar dons the high boots of the kings of Alba Longa, McCullough explains that it's because he has varicose veins. Epilepsy? No, not our Caesar, McCullough explains that he's simply seized by hypoglycemic fits.
She even did a little bit of this with Octavian/Augustus. She gives him asthma as a way to explain that allegations of a lack of physical courage aren't accurate.
I still really enjoyed her writing style and her attention to detail, but, particularly after seeing how she could give such an enjoyable portrayal of great, though flawed, men such as Marius and Sulla, I was profoundly disappointed that she seemed to suffer from a case of hero worship when it came to Caesar.