We all have ideas about ourselves. Most of the time these ideas are often magnified parts of ourselves. In one idea you might have all the good bits and in another all the bad bits. The idea that has all the good bits is usually you meeting all your high expectations and the bad idea of yourself is the one where you meet none of your expectations.
Sometimes expectations can be manageable and at other times they are so unrealistic. We are only human but in todays society it is looked down upon to not reach all of your expectations and then some.