At some point we need to change for the better, we all do. People tell us to be ourselves, and that is indeed good but being ourselves also mean that we need to change some negative aspects of ourselves and improve them for our sake, not for other people. The point is, when you are in a relationship, you shouldn't feel pressured to change. If you feel pressured, and if you feel like you are being nagged too much in the way you are, then quit it. Asking someone about their day is good and nice actually, but if you do it every day and if it becomes a monotonous part of your routine then it gets annoying eventually especially if the other person's day didn't go too well. But I think it is not clingy. You need to find someone who would accept you for what you are and not pressure you into changing anything about yourself. If you change anything, let it be at your own discretion and not because your partner nagged you about it.