Is it right to lower expectations?

Well if one of my options is to lower my expectations to achieve happiness/positivity, isn't that wrong? Isn't it right to always have high expectations? There is no right or wrong answer to that. It is just a choice. If you choose high standards, that will sometimes pull yourself and others up. It will often lead to frustration, resentment and sadness. Choosing to reduce or eliminate your expectation may lead to complacency, but it will also lead to happpiness. Each situation presents us with a choice. Are you making those choices automatically/reactively, or by intentional choice, based on what will lead to the desired outcome?