While Turkey has a very secular constitution, huge parts of the population are still religious. Initially, when AKP was formed, it was welcomed as a democratic way to balance strong secularism and moderate Islam. However since they are the strongest party, they have become more and more conservative and are now pushing the country too much into a religious direction for the taste of many.
Wasn't it just last week that Islamists were protesting Turkey's [Erdogan's] support of the Syrian rebels? I swear I've heard all sorts of things reported from Turkey about anti-Erdogan sentiment coming more from the fringe right than anywhere else. As always, could easily be explained by the filter of Turkish media applying to outside reporting.
Turkey may not be a police state, but it's definitely a repressive secular government, no matter who heads it at which time. Just got to look back a decade or two to see the precedent laid before them. Treatment of dissenters has always been heavy handed and misguided in long-term thinking. A bit alarming considering all the NATO arms and money they get.
Just hope Erdogan capitulates. He can still be rich and powerful even without his post, and he knows it. Wouldn't be a bad time to restore some faith in their democratic government, either. Dude's been around too long and he shouldn't be spreading gasoline on an already dry tinderbundle. Turkey is still a democracy but it wouldn't be too hard to see a street protest taken over by the extreme elements and go the way of Egypt.
Edit:
I have a proposition: Turkish people are dissatisfied with their government, Greek people are dissatisfied with their government. Say fuck it, combine nations, and see if the resulting parliament will be more or less corrupt than before. I'd hedge bets that it'd be marginally better. The nationalist parties can join forces too, gee, everyone will be happy.