避免自动释放的物体，良好做法或过度杀伤？

I am just curious with regards to the following, when I am writing code I always try and manage the memory myself by sticking to non-autoreleased objects. I know that this means that objects are not hanging around in the pool, but I was just curious if doing it this way in general is good practice or simply overkill?I am just curious with regards to the following