The change is positional. From positional enemies to positional peace with God. It does not necessarly require dramatic change in personality. If i look over my life in the past year things have improved dramatically.Most Christians like to claim they are "born again"...changed through God's grace. They will also claim these changes don't take place over night. I find that a bit a cop out...an excuse...should not this change be immediate? Some claim that it is.
I would say you can have high expectations of other people in general and Christians but in the process serenity is forfeited. I like a qoute from Alcoholics Anonymous book involving a Professor in the personal stories section. His serenity is directly proportional to his acceptance and inverse proportion to his expectations of other people. Most Christians are very decent people. I know! They put up with me. Done all they could to help me, again and again. Came to see me in jail. These are busy people. PH.Ds, People in business. So your perception of Christians and mine are dramatically different. I had to get to know them and they me. Knowledge is a windbag and love is a builder.