What a question! I've been thinking about things I am into for at least half an hour! :-0
Anyway, I'd say creativity of all kinds is my true passion. I enjoy drawing, sewing, knitting, embroidery, gardening, taking photos, repairing and restoring furniture.
I am always reading a couple of books at a time and listening to some music. I play the piano, though not often lately.
Besides, I am awfully curious and willing to learn, so I quite often get absorbed in philosophy, psychology, history and etc.
As my professional interests lay in the sphere of language learning I am obsessed by linguistics and teaching as well as by different languages: Russian, Old Russian, Greek, Latin, English, Italian, German. When/if I have some free time I prefer to spend it on languages (if my head doesn't mind)
Honestly, I can hardly draw a line between my job and my pastime.