quixotic \kwik-SOT-ik\ , adjective;
1. Caught up in the romance of noble deeds and the pursuit of unreachable goals; foolishly impractical especially in the pursuit of ideals.
2. Capricious; impulsive; unpredictable.
This word really describes me, especially the "capricious; impulsive; unpredictable" definition.
It's also probably because I've made a habit of tilting at windmills.