What's my favorite flavor? Well do you mean for lipbalm, pie, chips or cheese?
Favorite color? To wear, on a wall, on a car...?
Favorite book? I'd have to say the one that I blame for starting me thinking -- if what I do qualifies -- would be Stranger in a Strange Land. Then, what helped me figure out better where I stand -- and when to rethink a stance -- would be Starship
Troopers and the Callahan Yarns (including Lady Sally's books, of course).
Song? Whoo, THAT's a list and a half! Am I driving or dancing, digging the garden or working on a client or meditating or in circle? What time of day is and what mood am I in? What's the purpose of music at that moment for me?
i think I don't have "real" favorites, just situational favorites -- and even those change all the time!