Gee, I feel like I do in real world elections where I don't entirely agree with either of the two main factions, even if I lean one way.
In my opinion the entrenched Senatorial oligarchy had to go to make a functioning empire. I'm not sure how much of a populare I am, though. When it comes to lifestyle, religion and economics I certainly don't consider myself a radical.
That's why I like Augustus. He may have been fairly "radical" in coming to power but once in power he tried to restore some of old traditions of Rome. The main difference is that those traditions were open to a wider pool of contestants from the provinces rather than just a narrow band of Consular families from Rome. Augustus actually sharpened the class distinctions, but the "new men" from the provinces now had a stake in the Roman class system
Thanks to Augustus and some of his more reasonable successors, Rome slowly became a cultural ideal rather than just a town on the Tiber. If the narrow minded Senatorial oligarchy had had their way I think Rome would have been regarded as just another imperial parasite and oppressor rather than a lasting influence on Western civilization. It might have even collapsed long before it ultimately did, and we most likely wouldn't be here now singing odes to its glory.
Anyway, I voted "not sure." I'm not sure if the Optimate/Populare distinction is entirely meaningful to imperial politics.