A very fascinating yet complex issue. I want to love Sulla, but some of the things he did were inexcusable. Whenever I judge Sulla's actions, I like to break them down (I find it hard to put a single label on him). Here is my quickly surmised position:
Life and Career up to his First Consulship :roll:
Okay, so maybe he killed some friends and relatives, cavorted about with pretty male greek actors, and bribed his way into the Praetorship. Were these ethical political maneuvers? No. Were they atypical? No!
First March on Rome :x
Command against Mithidrates was rightfully his and was unlawfully wrested from him bt Marius and Suplicious. But, his march on Rome set a precedent so dangerous and so damaging that it mortally wounded the republic. It may have only started as a flesh wound, but it became infected and festered for many decades to come.
This is probably naive, but, maybe instead of taking his legions across the pomerium and into Rome he should have bypassed Rome and went east instead?
Second March on Rome
Well, since he's already done it once, I guess he had no alternative. I can't condone it, but I can understand why he did it.
Proscriptions :evil:
Sulla went too far and wide with this. It can be argued that he needed to do this to once and for all rid himself of his enemies in order to avoid repeat performances of the events before the Mithidratic campaign, but, there were too many killings that were for unrelated to the cause.
Dictatorship :?
I could have lived with a dictatorship if he had crafted it to the normal six-month term. But to be dictator for as long as he saw fit was horrible!
Reforms :roll:
Okay, if his reforms were truly meant to maintain the republic, he was thinkig was severely dilluted. A bloated senate and a weakend tribunate of the plebs isn't going to solve the republic's problems. I can understand why he wanted to weaken the trubunes. Every since the brother Gracchi the tribunate was used and or abused to usurp the power of the Senate. Do I believe in an authoritative senate alone? No But, the tribunes could be equally bad. Unfortunately, once the people have the power, how can you rightifully take it away (and expect them to be happy about it)?
Retirement hock:
On first glimpse his retirement would seem to support the idea that all of his intentions were good and after accomlishing everything he set out to do, he laid down his power and left himself accountable.
But, I think he retired not because it was the right thing to do in his mind, I think he was just tired of being at the center of it all. His retirement was for personal reasons not for public.
Conclusion
It does all really come down to his first march on Rome. If he could have found an alternative for dealing with Marius and Suplicious other than crossing the pomerium, I think Sulla would be viewed in a much differnt light. Again, I really like Sulla but most of his actions are just too horrific to paint him in a favorable light.