Well...
I tend to be a little schitzophrenic about my musical ability. On one hand, I think I'm a pretty good singer. On the other, I worry that I'm really not and I'm just fooling myself. As a result, I tend to crave compliments and attention.
I figure some ego is necessary for being a successful performer. There are so many people who will shoot you down that you need a pretty thick skin to survive it all with your psyche intact.