is this for the julio-claudians, why don't you just do augustus, it's much easier and more simpler. Anyway, i think that's how the emperors changed over the time, for example Gaius, Caligula was good in the beginning, respected the senate, got rid of maiestas, abolished unfavourable taxes, etc. When he got ill he mis-treated the senate, made anyone suffer who opposed and rose against him, he saw himself as a god, a divine, all the citizens were convinced that he is divine, his regin became dictatorial to the point where the praetorian guard had to take necessary precautions and execute him. I think that's, same for the others, like Nero was in good relations with his mother, but thatnks to a strong influence of Burrus and Senneca, he turned against her, and on the end killed her. Tiberius made Sejanus in conttrol of the empire while he was at Capri, later when he found out his schemes, he killed him, his family and relatives ruthleslly, also he was very polite and respected the senate, however as the senators and consuls became more demandable, he thought they were "man free to be slavs", so on.
Cheers, i think that's it.