^^^ Bumping because this thread just made my Monday... and today is exactly a year since it was last bumped.
Here are the very special 18-year-old thoughts that went through my mind about letters, colors, and symbols. Luckily with only three chapters we weren't required to drop any of the groups, so none of this was used as drop criteria!
Kappa Kappa Gamma: I didn't like that it had a repeat letter, and the Gamma didn't look Greek enough to me. My university's colors were navy & white, so Kappa's blue & blue didn't leave much room for variety. The owl was a little odd, but the key was pretty- definitely my favorite badge.
Kappa Alpha Theta: I loved the way the full name sounded, and that their nickname was a Greek-looking letter. Black & gold were a bit harsh, but I liked the simplicity of the kite badge.
Delta Gamma: Both letters were fully Greek, which made it seem more special or interesting (and somehow the Delta made the Gamma look more Greek when side-by-side). And they didn't have a Kappa letter like the other two! The white enamel on their badge seemed too strong at the time (although now I think it looks really classy on the DG badge), and I didn't like the Hannah dolls everywhere.
Then for someone else's story... I know one woman who chose her GLO before school started. She researched all three organizations and determined which one she thought would be most beneficial for networking after graduation

She was dead set on joining that org, regardless of the chapter itself. And yes, she joined- but I'm not sure whether the org actually helped her post-college.