Initially yes, my unconscious attention goes to the attractive faces. But then, when the person speaks or does something that is not congruent to the image, it may lose the power. It's like one of those beauties in Miss World contests, they are spectacular till they open their mouth to say something.
ps : If I look at the personalities who impress me, I find that beauty is secondary. For instance, I was immensely impressed with Barack Obama when I saw his speeches. What he did or did not do later was quite unimpressive but I still think he is quite charismatic speaker. If you want tips on public speaking, watch him.
I don't know if Alanis Morissette is considered beautiful, I find her quite attractive, especially when she is singing.
One person who is good looking and I still find him impressive is Tom Cruise. I like his determination and the quintessential alpha-male persona.