Can’t say much for Angola, but Venezuela has been a dictatorship since Chavez took to power. A friend of mine was told to come in to register her passport at the embassy so she could vote in the upcoming elections, her passport was returned a few days after the elections. It’s easy to be elected president when the people who vote against you can’t vote.

There’s China though. Their party is at least called a communist party. I wouldn’t call their politics communism, except for their land ownership laws. Basically a dictatorship, since anyone opposing the government seemingly ends up in prison. Hasn’t seemed to hinder their economic growth.