You're ready to fly off at any moment and that changeability makes you a winged creature, in a way. Birds, wings, and feathers represent that lightness of spirit that so captures who you are. Also symbol of hope, balance and good luck
I like the discreet feather idea for a tattoo. This may be cheesy, but it makes me think of Forrest Gump and how our lives are like feathers in the wind. being pushed by the wind and landing exactly where it is supposed to land.