High self esteem may lead oneself to put themselves on a high pedestal. May lead to a thought process of I am perfect ,everyone is to blame but not me ,I can't make mistakes because I am so above all and know it all...kind of thinking.If high self esteem leads to God complex, then it can be a problem.I think you should pay attention to your thoughts and actions and where the self esteem becomes a problem.Or else it is good to have.