How do you know what you want?
pg: One trick is to watch what you do.  If you keep inexplicably being drawn to something when other people wouldn't be, you probably like it.You can also try standing apart from yourself and just watching what makes you happy.  That's a bit complicated because your happiness is usually a function of the "trailing average" of what you've been doing lately.  E.g. if you're happy having a beer in the evening, is it simply because you like beer, or because you like having a beer after having gotten something done that day?