I can't give a black and white answer on this, I like aspects of both. But someone who is the extreme aspect at either ends is bad...someone so shy they never talk (or have nothing to talk about) is just as bad as someone who is so outgoing they even forget that you are there.

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"And as we all play parts of tomorrow, some ways will work and other ways we'll play. And I know we can't all stay here forever, so I'll write, my words on the face of today...and then they'll paint it" - Shannon Hoon

I think I am the one who likes the outgoing girl. Since I am really shy with the strangers or just acquaintences. However, if I know the person better, she would never get me to shut up .
I think it is just like my astrological sign... the cancer. I will have a hard shell protecting myself. But once you get me get out of my shell, you will have access to the deepest in me.