I think Delta Gamma and Delta Zeta have the best colors. Pink and green go together so well, and so do pink and blue. Oh, and I love how girly Phi Mu's is, too. I'm not the biggest fan of my sorority's colors. On bid day, we use red, green, AND white ballons just to make it look less like a Christmas party! But, our interior decorator flawlessly incorporated them into our house and everything looks so springy and beautiful--I love it.
Chi O's owl is the CUTEST thing ever. But I have to say I'm a big fan of "thing" mascots. KKG's key, DG's anchor, Theta's kite, Pi Phi's arrow, ZTA's crown, and of course, my own lyre

, to name a few.
Tri-Sig has the best motto, "Faithful unto Death." I love their use of skulls and crossbones (and Chi O's, too). It's so mysterious and secretive and cool.