One thing that happened was that the Ottomans decided on slaughtering most of the current aristocracy that was in place before they came - which was logical for them as they didn't want the previous monarchs to interfere with their rule. On the other hand they treated farmers better and they had more rights than before. They could also marry between religions if they wanted to. They also had the same cultural rights as before.
In order to be a member in the European Union or EU, countries are required to be a democracy. They all have democratic governments but have different styles of democracy.