I struggle a bit with coming up with a form of government (i.e., dictatorship, ect...) and am curious to see what people usually use... so what type of government do you guys use?
How are you planning to use the form of government in a story? That is, if there's to be an assassination, then some sort of monarchy, dictators included, would be the best choice. If it's a story of rival families, then the field is broader.
The other posts should answer your original questions: people use all kinds of governments, including none!