C152 is one of the easiest aircraft to fly but one of the hardest to fly well.
As a trainer it is particularly good because it is easy to show how such a seemingly placid aircraft can bite your arse if you dont treat it with respect.
What I am saying is that it misbehaves when you (you=instructor) want it to.
If only it was three inches wider...
If this thread was about slagging off a PA28-161 then I would be in total agreement but I love C152's because as a training tool they are yet to be beaten.
P.S. A totally biased, emotionally laden viewpoint and nothing will change my mind so dont even bother arguing any point made above!