Okay, this is a strange one.

"Yes, but there's a nasty side to her, too."

Multi-faceted. If we can all be considered polyhedrons, then some are cubes and some are dodecahedrons and some are irregular. Cubes are simple, regular people with few noticeable personality traits. Dodecahedrons might be sucessful people, people who are still rather normal but act differently around different people. I would be an irregular shape, with an unpredictable nature and, on occasions, a certain lack of control. Sometimes I slip and let an acquaintance perceive a face I should not.

I think, though, that I would like most to be a sphere. Only one side, but might be seen so differently from different angles.