Here's my personality according to eMode's personality test. I took this one maybe four years ago. I have changed! Or at least, my perception of myself has changed, which is what these tests are really testing. Anyway, I'm a Secret Agent. Like Sydney Bristow! Unfortunately, eMode is now a pay site, so you can only get brief results descriptions. But here it is anyway:

Your personality is actually determined by two personality sub-types - your primary, or dominant sub-type, and your secondary sub-type. You are a Secret Agent which means you are a Thinker / Seeker Your primary sub-type is defined by "Thinker" characteristics and your secondary sub-type is defined by "Seeker" characteristics.

That means you're basically a smart, shrewd loner. Chances are although you prefer solitude, you're a deeply caring person full of energy and ideas. On a personal level, you're sensitive. You may worry too much about how you compare to others, and your mood suffers under such intense personal scrutiny.