What other reasons did the Separatists have for Separatism?

I am doing a report on the element of Separatism in Star Wars, but have only found that the various Unions and Planets wanted to separate because of high taxes on trade routes and corruption in the Senate. Aside from Palpatine's ulterior motives, are there any other reasons that the Separatists wanted to secede from the Republic? (Answers do not have to be canon)