Actually there are a lot of things of myself I'd like to change which probably tells I'm greatly flawed but I'd like to look at it from a positive angle. I have experienced it on my own that when I've tried to victimize myself about a negative aspect of my persona then it only left me feeling depressed. On the other hand when I've tried to accept within myself that I have problems in a certain area and I need to put in more sincere efforts to improve performance on that area, I have felt a positive energy to put in the required effort after pursuing it for a while.
Therefore instead of changing one particular thing about myself I'd like to maintain a positive approach towards everything to tackle the negativity that creeps into the mind every now and then, knowingly or unknowingly.