Well, I have been very pleased with my K88. I have been lucky I guess because I have only had one poor lens, the rest are very sharp except the 150 wide open when it gives portraits a pleasing soft look.
Plus the communist insignia on the lenses make them look pretty cool. They are a crap shoot though so buy from a reputable place.
I appreciate the fact that no one suggested the Holga or Diana to the OP.