Thongs are the most comfortable things to wear for me. I'm not sure why guys are so shocked when they find out I don't wear bikini bottoms... they're just undies. I think my undies do speak for my personality though, not so much the type (like a thong or granny panties) as much as the design and colors do.
Most of my undies are lacy, brightly colored (or have some pop of color), have little bows and ruffles, and are mostly pink, red, or black.
And I'm a "gamer," which also surprises guys because I'm a "girly" girl.